A would be correct. Think about it; plot contrivances are of the mistaken identity type, so they wouldn't help the mood. Historical accuracy wouldn't either, because its just who was where when. Anticlimax is basically a disappointing end to a story, and trust me, those definitely don't improve the mood. Appropriate comparison makes the most sense.
I hope this is right.
The first one is D and the second one maybe B
I hope I helped and I wish you the best of luck on your test :)
Shakespeare sonnet number 9
Or
"or" combines the two independent clauses