SC: agronomists in the Midwest

[GK]

[Deleted because this question is from a banned source - see below.]

Can you please explain why A is correct and a better choice than D? I somewhat understand that D states that the agronomists will raise agricultural staples, which is obviously incorrect. But isn't 'reversion to the raising of agricultural staples' incorrect? Can you shed some light? Thanks.

[StaceyKoprince]

Please cite the source of the question; if you don't, we'll have to delete the post. (And we won't answer it unless the author is cited!) Thanks.

[GK]

I believe that the source is testmagicforum.com

[RonPurewal]

Same deal as the other one - you can't cite a forum as a source. You have to find out where the question originally came from, because a couple of original sources (such as kaplan and scoretop) are banned here.

[sanj]

[Deleted because this question is from a banned source.]

A: correct, reversion to the raising(noun) is correctly used. infinitive does not fit here because there is no purpose to raise the staples.
B,C:reversion back redundant
D: use of infinitive doesn't fit
E: reversion into wrong idiom???