Dear Friends,
Here is a detailed explanation to this question-
mrsmarthi wrote:
The nineteenth-century chemist Humphry Davy presented the results of his early experiments in his "Essay on Heat and Light", a critique of all chemistry since Robert Boyle as well as a vision of a new chemistry that Davy hoped to found.
(A) a critique of all chemistry since Robert Boyle as well as a vision of a
(B) a critique of all chemistry following Robert Boyle and also his envisioning of a
(C) a critique of all chemistry after Robert Boyle and envisioning as well
(D) critiquing all chemistry from Robert Boyle forward and also a vision of
(E) critiquing all the chemistry done since Robert Boyle as well as his own envisioning of
Choice A: This answer choice maintains parallelism and proper pronoun usage throughout the sentence. Thus, this answer choice is correct.
Choice B: This answer choice suffers from a case of pronoun ambiguity; the pronoun "his" could refer to either "Humphry Davy" or "Robert Boyle". Thus, this answer choice is incorrect.
Choice C: This answer choice breaks parallelism by comparing the noun "a critique" to the verb "envisioning". Thus, this answer choice is incorrect.
Choice D: This answer choice breaks parallelism by comparing the verb "critiquing" to the noun "a vision". Thus, this answer choice is incorrect.
Choice E: This answer choice breaks parallelism by comparing the gerund noun "envisioning" to the verb "critiquing". Thus, this answer choice is incorrect.
Hence, A is the best answer choice.To understand the concept of "Avoiding Pronoun Ambiguity on GMAT", you may want to watch the following video (~1 minute):
All the best!
Experts' Global Team