A proxy war is <span>a war instigated by a major power that doesn't want itself to become involved.</span>
The correct answer is The page number only
Since you've already mentioned who the author is, you don't have to mention him again. The book title would only be added if you're using multiple sources from the same author. If only one, then the page number only.
Answer:
I think it is B.
Explanation:
By process of elimination. It doesn't do any of the things mentioned in the other options.
It DOES NOT give future insight... (A)
It does show changes in U.S. agriculture. (B)
It DOES NOT identify different herbicides. (C)
It DOES NOT explain insect-resistant crops. (D)
and It DOES NOT clarify how to handle changes. (E)
Hope this helps!