GMAT Sentence Correction (SC) | Re: Heavy commitment by an executive to a course of action,

Query 1:
There isn't probably any official rule that an object of preposition cannot be referred to by a pronoun. Rather I would site an example in the contrary:

I was sitting on the top of thetable beforeit broke.

I do not see any problem with the above example in which the pronoun ( blue font) refers to a noun within a prepositional phrase.

(From the official explanation, it can be concluded that GMAT allows the use of pronoun to refer to a noun within a prepositional phrase.)

Query 2:
In
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