gerund vs noun

[questionbox]

In the mid-1960's a newly installed radar warning system mistook the rising of the moon as a massive missile attack by the Soviets.
(A)rising of the moon as a massive missile attack by the Soviets
(B)rising of the moon for a massive Soviet missile attack
(C)moon rising to a massive missile attack by the Soviets
(D)moon as it was rising for a massive Soviet missile attack
(E)rise of the moon as a massive Soviet missile attack

I choosed the right answer B, but I cannot get the difference between the "rising" and "rise".
help me guys.

[hardik.jadeja]

The option B is the correct answer here because of idiom "mistake X for Y".

[grockit_andrea]

In the mid-1960's a newly installed radar warning system mistook the rising of the moon as a massive missile attack by the Soviets.
(A)rising of the moon as a massive missile attack by the Soviets
(B)rising of the moon for a massive Soviet missile attack
(C)moon rising to a massive missile attack by the Soviets
(D)moon as it was rising for a massive Soviet missile attack
(E)rise of the moon as a massive Soviet missile attack

I choosed the right answer B, but I cannot get the difference between the "rising" and "rise".
help me guys.

First, there's an idiom issue here; "mistook X for y," is correct, not "mistook x as y" or "mistook x to y." That allows us to narrow the choices to B and D, and D makes it sound like the moon was rising for an attack, which just doesn't make sense. I think the "rise" versus "rising" issue here is just a common usage difference. You would say "moonrise" or "sunrise," but use the gerund to say "rising of the sun" or "rising of the moon." I don't know if this is such a firm difference that it could be termed an idiom, but it doesn't really matter, since the "mistook x for y" idiom allows us to avoid the issue anyway.

[missionGMAT007]

IMOB
Idiom - mistook X for Y

[sumanr84]

+1 for B.

I have a question related to usage,

which is better,

1. a massive missile attack by the Soviets , OR
2. a massive Soviet missile attack

[hardik.jadeja]

+1 for B.

I have a question related to usage,

which is better,

1. a massive missile attack by the Soviets , OR
2. a massive Soviet missile attack

a massive Soviet missile attack - is better

[questionbox]

thank everybody here, it makes sense now.

[pnk]

+1 for B.

I have a question related to usage,

which is better,

1. a massive missile attack by the Soviets , OR
2. a massive Soviet missile attack

a massive Soviet missile attack - is better

I think 'a massive missile attack' is better - massive modifies missile hr

[gmatmachoman]

+1 for B.

I have a question related to usage,

which is better,

1. a massive missile attack by the Soviets , OR
2. a massive Soviet missile attack

1. makes sense. massive is a adjective that modifies "missile"

whereas in 2, massive modifies "Soviet...

[sumanr84]

I am also in favor of 1, and so I posted to get to know from you people.
At least, I have 2 people in favor of me ( pnk, gmatmachoman .. )