Explanation
Creating a filter: In this question, the original sentence
has an error at the end of the underlined portion: "leading" should be the past
tense verb "led" in order to be parallel with "inhibited."
Applying the filter: as we look at the answer choices
after (A), we can focus first on the latter two verbs. Choice (B) fixes the
problem with "led" but makes other changes; it replaces "which" with a phrase
with the pronoun "it," which has ambiguous reference, so (B) is out. Choice (C)
has parallel verbs with "inhibiting" and "leading," so it passes our filter.
Choice (D) creates an ungrammatical structure in which "inhibited," in coming
after a comma splice, has no grammatical verb, so (D) is out. Choice (E) is not
parallel between "inhibiting" and "led." The correct answer is (C).
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