Bunuel
Getting adequate sleep, a full eight hours every night, the depth of
which will be enhanced by a regular regimen of physical exercise, with significant consequences for not only one’s immediate short term health, but also for the immune system’s ability in fighting major illness over the long term.
A. which will be enhanced by a regular regimen of physical exercise, with significant consequences for not only one’s immediate short term health, but also for the immune system’s ability in fighting
B. which will be enhanced by a regular regimen of physical exercise, has significant consequences not only for one’s immediate short term health, but also for the immune system’s ability to fight
C. which will be enhanced by a regular regimen of physical exercise, having significant consequences for not only one’s immediate short term health, and for the immune system’s ability to fight
D. which will be enhanced by a regular regimen of physical exercise, has significant consequences not only for one’s immediate short term health, and also for the immune system’s ability in fighting
E. that will be enhanced by a regular regimen of physical exercise, which has significant consequences not only for one’s immediate short term health, and the immune system can fight
Magoosh Official Explanation:
Here, the gerund begins the sentence and is (or should be) the main subject of the entire sentence. Again, there are multiple splits, and it does not matter which one we analyze first.
Split #1: on the Sentence Correction, the GMAT adores the “not only P, but also Q” construction: only choices (A) & (B) have this correct idiom. Incorrect variants include “not only … and” (choices (C) & (E) make this mistake) and “not only … and also” (choice (D) makes this mistake).
Split #2: one mistake involves
the placement of the common word “for” in parallel structure. The word “for” can either appear once before and outside of the parallel structure — “for not only P but also Q” (no answer choice has this) — or it can be repeated in each term of the parallel structure —- “not only for P but also for Q” (choices (B) & (D) have this correct). It is a classic GMAT Sentence Correction mistake to have the common word once outside and once inside, as in “for not only P, but also for Q” (choices (A) & (C) have this incorrect construction). Choice (E) blatantly violates the parallelism, so that’s an even bigger problem!
Split #3: The “ability” idiomatically is followed by an infinitive — the “ability to do something” (choices (B) & (C) get this correct). A common idiomatically incorrect construction involves the word “ability” + “in” + [gerund] — “ability in doing something” (choices (A) & (D) make this idiom mistake). Choice (E) avoids this particular issue by blatantly violating the parallel structure, again, a much larger problem.
Those three splits are already enough to isolate choice (B) as the only possible correct answer.
Another more sophisticated split I’ll point out involves the
missing verb mistake. If you notice, choices (A) & (C) are not complete sentences — the noun “getting” does not have its own verb anywhere in these sentences. Choices (B) & (D) provide the main verb “has” for the main subject “getting.” Sentence (E), with it substitution of “that” for “which” has a particular bizarre structure — technically, in version (E), everything from “the depth of that” to the end would be a complete sentence, but then the whole first part is odd gerund phrase that sticks out awkwardly like a sore thumb and doesn’t fit with the rest. If we fixed the other mistakes in choice (E), we could rectify this problem by constructing two separate sentences following this layout: “Getting adequate sleep, a full eight hours every night, is important. The depth of this sleep will be ….” That would be a possibility in real-life editing. In the GMAT Sentence Correction, though, you have to stick to one sentence, so (E) is out.
The best answer is (B).