by giladedelman Tue Jul 05, 2011 11:41 pm
Good explanation!
So, to add to the discussion of answer (B), the problem is that the passage does not indicate that the unfinished book was going to make changes to the earlier writings on African artistic influences. We know that Porter was constantly revising and updating his stuff, and we know he had this unfinished project, but there is no indication that the two things were related.
(A) is incorrect for basically the same reason. There is no indication that the unfinished study would have contradicted, amended, etc., the earlier book.
(C) is out because, again, we don't know that the unfinished project would have any connection to the earlier study.
(E) is incorrect because these "theories" are totally out of scope.