GMAT Sentence Correction

Sentence Correction is the most "math-like" question type in the Verbal - speed is of the essence, and the best way to gain speed is to exploit the answer choices. The answer set below presents a typical structure.

Of all the possible disasters that threaten American agriculture, the possibility of an adverse change in climate is maybe the more difficult for analysis.

(A) is maybe the more difficult for analysis

(B) is probably the most difficult to analyze

(C) is maybe the most difficult for analysis

(D) is probably the more difficult to analyze

(E) is, it may be, the analysis that is most difficult

Choice B is the best answer. The sentence compares one thing, an adverse change in climate, to all other things in its class-- that is, to all the possible disasters that threaten American agriculture, therefore, the sentence requires the superlative form of the adjective, most difficult, rather than the comparative form, more difficult, which appears in choices A and D. In A and C, the use of maybe is unidiomatic, and difficult should be completed by the infinitive to analyze. Choice E is awkwardly phrased and, when inserted into the sentence, produces an illogical structure: the possibility ... is... the analysis that.

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