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Sentence Correction 27 / 50

Choose the option that best corrects the grammatical or logical error in the underlined fragment.

The pioneering research, spearheaded by Dr. Anya Sharma, not only elucidated the complex mechanisms underlying cellular aging but also its findings had a profound impact on the development of novel therapeutic interventions.

A. (No change)
B. making its findings profoundly impact the development of novel therapeutic interventions
C. profoundly impacting the development of novel therapeutic interventions with its findings
D. profoundly impacted the development of novel therapeutic interventions

1. Identification of Error: Parallelism error with correlative conjunctions.
2. Grammatical Rule: When using correlative conjunctions like "not only... but also," the grammatical structure that follows "not only" must be parallel to the grammatical structure that follows "but also."
3. Option Elimination:
A. Incorrect — The phrase following "not only" is a verb phrase ("elucidated the complex mechanisms..."), while the phrase following "but also" is an independent clause ("its findings had a profound impact..."). This breaks parallelism.
B. Incorrect — "making its findings profoundly impact..." is a participial phrase, which does not parallel the active verb "elucidated."
C. Incorrect — "profoundly impacting..." is also a participial phrase, failing to achieve parallelism with the active verb "elucidated."
D. Correct — "profoundly impacted the development of novel therapeutic interventions" is a verb phrase that parallels "elucidated the complex mechanisms," both being active past tense verbs followed by their respective objects and modifiers, thereby restoring parallelism.

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