Bunuel
James Watt did not invent the steam engine—versions existed since the early eighteenth-century—but Watt added a condenser, and this improvement made the engine so efficient and powerful that it became available for widespread industrial use.
A. this improvement made the engine so efficient and powerful that it became
B. this improvement made the engine of such efficiency and power, it would become
C. so efficient and powerful it was that this improvement made the engine, that it became
D. such was the efficiency and power caused by this improvement, it has become
E. there was so much efficiency and power in this improvement that it became
Magoosh Official Explanation:
A question about scientist James Watt and the steam engine.
The most common idioms of consequence are
so [adjective] that
such [noun] that
Choice (A) uses the first idiom. It is sleek and elegant: no problems.
Choice (B) opts for the second idiom, turning the adjectives into nouns, and it omits the “that”—this omission makes this answer too casual for the GMAT, whereas turning the adjectives into nouns makes it too stilted. This answer choice fails in both directions! Choice (B) is incorrect.
Choice (C) is hyper-dramatic, far more dramatic and emphatic than the context demands. Furthermore, the dramatic rearrangement introduces a second “that,” which is confusing. The words “that” and “it” each appears twice, each doing different things—very confusing! Choice (C) is incorrect.
Like choice (B), choice (D) turns the adjectives into nouns and omits the “that.” This is even more hyper-dramatic than (B), but it has the same casual omission of “that.” It seems to suggest, illogically, that the “improvement” and not the “engine” became widely available. It’s also strange passive and indirect. Choice (D) is wrong for a number of reasons.
Choice (E) is extremely indirect, passive, and livy-livered. Like (D), this illogically suggests that the “improvement” and not the “engine” became widely available. Choice (E) is grammatically correct but it has rhetorical and logical problems. Choice (E) is incorrect.
Choice (A) is the best answer.