Active vs Passive



A) John was not ready to move to the new company because they had not rated it highly by any investment company.

B) Because of its low investment rating, John was not ready to move to the new company.

C) Because of it's low investment rating, John was not ready to move to the new company.

D) John was not ready to move to the new company because no investment company rated it highly.

E) John was not ready to move to the new company since it was not rated highly by any investment company.

Explanation:
(D). The first answer contains a pronoun (they) without an antecedent.
In addition, the sentence is ungrammatical, having a 'by'-phrase from a passive without the required form of 'be' in the verb.
Choices (A) and (E) have passives, always avoid passives in GMAT.
Choices (B) and (C) contain misplaced modifiers, making the correct choice (D).