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Here is a detailed explanation to this question-
Curly05
The use of gravity waves, which do not interact with matter in the way electromagnetic waves do, hopefully will enable astronomers to study the actual formation of black holes and neutron stars.
(A) in the way electromagnetic waves do, hopefully will enable
(B) in the way electromagnetic waves do, will, it is hoped, enable
(C) like electromagnetic waves, hopefully will enable
(D) like electromagnetic waves, would enable, hopefully
(E) such as electromagnetic waves do, will, it is hoped, enable
Meaning is crucial to solving this problem:Understanding the intended meaning is key to solving this question; the intended meaning of this crucial part of this sentence is that it is hoped that the use of gravity waves will enable astronomers to study the actual formation of black holes and neutron stars.
Concepts tested here: Meaning + Comparison + Idioms + Awkwardness/Redundancy• A comparison must always be made between similar things.
• “like” is used for comparing nouns, “as” is used for comparing actions/clauses, and “such as” is used for giving examples.
• "hopefully" means "full of hope" and not "it is hoped"; for this subtlety, please be very careful when you see "hopefully" in an answer choice; it is generally incorrect.
A: This answer choice alters the meaning of the sentence through the phrase "hopefully will enable"; the use of the adverb "hopefully" to modify "will enable" illogically implies that the use of gravity waves will carry out the action of enabling astronomers
in a hopeful manner; the intended meaning is that
it is hoped that the use of gravity waves will enable astronomers; remember, "hopefully" means "full of hope" and not "it is hoped". Besides, the placement of “hopefully” is such that it doesn’t directly modify the verb “enable”; “will hopefully enable” would have made Choice A more competitive. On a side note, the term “hopefully” is generally incorrect on GMAT as it often suffers from such imperfect adverbial usage issues.
B: Correct. This answer choice uses the clause "it is hoped" to modify the verb "enabled", conveying the intended meaning - that
it is hoped that the use of gravity waves will enable astronomers. Further, Option E correctly compares the clauses "interact with matter" and "electromagnetic waves do". Additionally, Option B avoids the idiomatic error seen in Option B, as it uses the phrase "in the way" rather than "like" to draw a comparison. Besides, Option B is free of any awkwardness or redundancy.
C: This answer choice alters the meaning of the sentence through the phrase "hopefully will enable"; the use of the adverb "hopefully" to modify "will enable" illogically implies that the use of gravity waves will carry out the action of enabling astronomers
in a hopeful manner; the intended meaning is that
it is hoped that the use of gravity waves will enable astronomers; remember, "hopefully" means "full of hope" and not "it is hoped". Further, Option C incorrectly compares the clause "interact with matter" to the noun phrase "electromagnetic waves"; remember, a comparison must always be made between similar things. Besides, the placement of “hopefully” is such that it doesn’t directly modify the verb “enable”; “will hopefully enable” would have made Choice C more competitive. On a side note, the term “hopefully” is generally incorrect on GMAT as it often suffers from such imperfect adverbial usage issues.
D: This answer choice alters the meaning of the sentence through the phrase "would enable, hopefully"; the use of the adverb "hopefully" to modify "will enable" illogically implies that the use of gravity waves will carry out the action of enabling astronomers
in a hopeful manner; the intended meaning is that
it is hoped that the use of gravity waves will enable astronomers; remember, "hopefully" means "full of hope" and not "it is hoped". Further, Option D incorrectly compares the clause "interact with matter" to the noun phrase "electromagnetic waves"; remember, a comparison must always be made between similar things. Additionally, Option D redundantly uses the verb "would" alongside the adverb "hopefully"; remember, “will” is preferred for referring to events that are certain to happen, and “would” is preferred for referring to events that are hypothetical, meaning the use of “would” alongside words that express uncertainty is redundant.
E: This answer choice incorrectly uses the phrase “such as” rather than “as” to compare the clauses “interact with matter” and “electromagnetic waves do”; remember, “like” is used for comparing nouns, “as” is used for comparing actions/clauses, and “such as” is used for giving examples.
Hence, B is the best answer choice.To understand the concept of "Like" vs "As", you may want to watch the following video (~2 minutes):
All the best!
Experts' Global Team