Assume that the first part of my question below were correct, would there be two possible choices C and D? [...]novice posted:
The larger the area of forest is destroyed, .......
A. the most frequent natural disasters are
B. the most frequently natural disasters occur
C. the more frequent are natural disasters
D. the more frequently natural disasters occur
Yes, Novice, if the first part of the sentence were correct, which it isn't, then (C) or (D) would both be possible answers. But I'd prefer no inversion in (C): "the more frequent natural disasters are."
To prove the correctness of (C), you can point to the fact that it is possible to have sentences like this: "Natural disasters are the more frequent the more we destroy forests." ♣