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

Hi, as per the expln:
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.

I find no reasons why B is better to C?

So,does GMAT love "infinitives" or hate "maybe"........Help Please..thanks

It's idiomatic usage. You don't use 'difficult for X' unless X is a person who finds the activity difficult. If the activity itself is difficult, then THE proper way to phrase the sentence is 'difficult TO do', or, in general, 'difficult TO (verb)'.