2016OG 77

[Crystal W]

While it costs about the same to run nuclear plants as other types of power plants, it is the fixed costs that stem from building nuclear plants that makes it more expensive for them to generate electricity.

A. While it costs about the same to run nuclear plants as other types of power plants, it is the fixed costs that stem from building nuclear plants that makes it more expensive for them to generate electricity.
B While the cost of running nuclear plants is about the same as for other types of power plants, the fixed costs that stem from building nuclear plants make the electricity they generate more expensive.
C. Even though it costs about the same to run nuclear plants as for other types of power plants, it is the fixed costs that stem from building nuclear plants that makes the electricity they generate more expensive.
D. It costs about the same to run nuclear plants as for other types of power plants, whereas the electricity they generate is more expensive, stemming from the fixed costs of building nuclear plants.
E. The cost of running nuclear plants is about the same as other types of power plants, but the electricity they generate is made more expensive because of the fixed costs stemming from building nuclear plants.
In OG, the explanation of choice D si "The preposition for is redundant in comparing the two objects of run. Since it is not clear what stemming...refers to, thisis a dangling modifier." I have two questions. First, can you explain the for? Second, can I say stemming...refers to the previous whole sentence?
Thanks in advance!

[DavidG@VeritasPrep]

While it costs about the same to run nuclear plants as other types of power plants, it is the fixed costs that stem from building nuclear plants that makes it more expensive for them to generate electricity.

A. While it costs about the same to run nuclear plants as other types of power plants, it is the fixed costs that stem from building nuclear plants that makes it more expensive for them to generate electricity.
B While the cost of running nuclear plants is about the same as for other types of power plants, the fixed costs that stem from building nuclear plants make the electricity they generate more expensive.
C. Even though it costs about the same to run nuclear plants as for other types of power plants, it is the fixed costs that stem from building nuclear plants that makes the electricity they generate more expensive.
D. It costs about the same to run nuclear plants as for other types of power plants, whereas the electricity they generate is more expensive, stemming from the fixed costs of building nuclear plants.
E. The cost of running nuclear plants is about the same as other types of power plants, but the electricity they generate is made more expensive because of the fixed costs stemming from building nuclear plants.
In OG, the explanation of choice D si "The preposition for is redundant in comparing the two objects of run. Since it is not clear what stemming...refers to, thisis a dangling modifier." I have two questions. First, can you explain the for? Second, can I say stemming...refers to the previous whole sentence?
Thanks in advance!

It costs about the same to run nuclear plants as for other types of power plants is incoherent. This clause seems to try to convey It costs about the same to run nuclear plants as [to run] other types of power plants. If we're comparing how much it costs to run one type of plant to how much it costs to run another type of plant, the preposition "for" has no role to play.

Notice in B, While the cost of running nuclear plants is about the same as for other types of power plants, we're comparing the cost of x with the [cost] for y. In this case the preposition "for" is appropriate as it's introducing a noun that modifies the kind of cost we're talking about.

[DavidG@VeritasPrep]

Second, can I say stemming...refers to the previous whole sentence?
Thanks in advance!

Typically, if we see the following construction: CLAUSE + COMMA + -VERB-ING, the VERB-ing modifier will refer to the subject of the previous clause. In D, we have the electricity they generate is more expensive, stemming from the fixed costs

It's illogical to write that the electricity stems from fixed costs

[thang]

the use of the same as is hard
in the second clause of comparision, only the second factor of comparision appear and appear in a clear way. look at the dictionary to see the same as

the 2 compariosn factors in the 2 clause must have the same fuction, both being two sujects at two clauses or both being two objects at two clause.

we need for in the second clause to make power plant have the same fuction as nuclear plant.

a hard question of comparision with the same as

[Crystal W]

While it costs about the same to run nuclear plants as other types of power plants, it is the fixed costs that stem from building nuclear plants that makes it more expensive for them to generate electricity.

A. While it costs about the same to run nuclear plants as other types of power plants, it is the fixed costs that stem from building nuclear plants that makes it more expensive for them to generate electricity.
B While the cost of running nuclear plants is about the same as for other types of power plants, the fixed costs that stem from building nuclear plants make the electricity they generate more expensive.
C. Even though it costs about the same to run nuclear plants as for other types of power plants, it is the fixed costs that stem from building nuclear plants that makes the electricity they generate more expensive.
D. It costs about the same to run nuclear plants as for other types of power plants, whereas the electricity they generate is more expensive, stemming from the fixed costs of building nuclear plants.
E. The cost of running nuclear plants is about the same as other types of power plants, but the electricity they generate is made more expensive because of the fixed costs stemming from building nuclear plants.
In OG, the explanation of choice D si "The preposition for is redundant in comparing the two objects of run. Since it is not clear what stemming...refers to, thisis a dangling modifier." I have two questions. First, can you explain the for? Second, can I say stemming...refers to the previous whole sentence?
Thanks in advance!

It costs about the same to run nuclear plants as for other types of power plants is incoherent. This clause seems to try to convey It costs about the same to run nuclear plants as [to run] other types of power plants. If we're comparing how much it costs to run one type of plant to how much it costs to run another type of plant, the preposition "for" has no role to play.

Notice in B, While the cost of running nuclear plants is about the same as for other types of power plants, we're comparing the cost of x with the [cost] for y. In this case the preposition "for" is appropriate as it's introducing a noun that modifies the kind of cost we're talking about.

Thank you for your reply! Do you mean that in the construction the cost of A...the same as for B, of A and for B are parallel? Why they do not use the same prep? Also, in choice E, I believe is about the same as compares the nuclear plants and other types of power plants, and The cost of running is used for both these two noun phrase. Can you correct me?