I choose (D) first time around, crossing out (E) without much to bother, but reviewing, I found to have had conveniently neglected the first paragraph entirely when choosing which had much of the authors stance/opinion, and was immersed only with bulk of the content (Pp 2-5) that linearly described the development and main arguments of conflicting viewpoints.
(E) seems to capture authors stance but (D) better describes the bulk of the content...how would you resolve such despair...does the question stem has anything to do with leaning for one side? i.e., "primarily concerned" question would weigh on what bulk of the content is, whereas "primary purpose" question would emphasize author's stance/opinion...just a desperate attempt to reason why (D) is right in this case...
Thx