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
IS THERE A RULE WHEN TO USE INFINITIVES, AND WHEN NOT TO ?
This question tests whether you need maybe/probably and the usage comparatives/superlatives.
Also here "difficult" needs the infinitive "to analyze".
As for using the inifintive, I don't think there is a rule which tells you when to use it or not.
You just have to be careful when the infinitive is split by something like an adverb. Placing of words here and can change the meaning.
This is an excerpt from bartleby.com. Moderators, if this is violates the copyright please delete it.
If you plan on keeping your split infinitives, you should be wary of constructions that have more than one word between to and the verb. The Usage Panel splits down the middle on the one-adverb split infinitive. Fifty percent accept it in the sentence The move allowed the company to legally pay the employees severance payments that in some cases exceeded $30,000. But only 23 percent of the panel accepts the split infinitive in this sentence: We are seeking a plan to gradually, systematically, and economically relieve the burden. The panel is more tolerant of constructions in which the intervening words are intrinsic to the sense of the verb. Eighty-seven percent of the panel accepts the sentence We expect our output to more than double in a year.
If this is too much information, just ignore it
I'm crossing the bridge.........