Sentence Correction

Thirteen states from all regions of the country announced a plan to impose new controls on pollution from truck and bus engines in that they will jointly adopt eission limits that would be far stricter than the federal rules.
A to impose new controls on pollution from truck and bus engines in that they will jointly adopt
B to impose new controls on truck and bus engines' pollution by the joint adoption of
C to impose new controls on pollution from truck and bus engines, and jointly adopting
D for imposing new ontrols on pollusion from truck and bus engines, and jointly adopting
E for imposing new controls on truck and bus engine pollution in the joint adoption of

for this sc ,

RonPurewal once wrote:those modifiers aren't attached to the announcement; they're attached to "a plan".

both of them are idiomatically legitimate; they just mean different things.
a plan TO DO X means that people now have the intention of doing X, whereas before they did not.
a plan FOR DOING X means a plan for how to actually execute this action; usually, this construction implies that the intention was already there, but that the plan of execution is new.

I wanna ask:
but is here rule here about to do /for doing?
about a plan to do. a plan for doing, ron says clearly. but
if in other SCs, what should I do to justify whether I should choose TO/ FOR?
like
prep-
Scientists claim that the discovery of the first authenticated mammal bones in amber could provide important clues of determining, in addition to how, when mammals colonized the islands of the West Indies.

A. of determining, in addition to how, when mammals colonized the islands of the West Indies
B. in the determination of how and when the islands of the West Indies were colonized by mammals
C. to determine how mammals colonized the islands of the West Indies and when they did
D. for determining when the islands of the West Indies were colonized by mammals and how they were
E. for determining how and when mammals colonized the islands of the West Indies
like this SC, d is correct,
but why C is not right? from the distinguish to and from

Both the questions you pasted here have same issue -- "they"

For the first question the correct answer should be OPTION C

In the original choice -- what is 'they' referring to? logically we are OK - they should refer back to ENGINES. But in GMAT SC that thing should be crystal clear.



for the second question the correct answer should be OPTION E

This one is easy 'clues of determining' is incorrect - eliminate A

Option C - is wrong because we don't know the clear referent of 'they' here. Plus Active voice is preferred over Passive voice.

Option E is the straightforward and pretty clear.

PS: It will be great if you start underlining the part under review. It becomes easier for all.

Plus - use spoilers to hide the correct answer [ referring to previous post of yours]