Well, it doesn't show your italics, but if I had to guess, if say A. Hope this helps
Answer:
The neighbor's belief in the need for a wall is why the two men must go through the trouble of rebuilding this one.
Explanation:
I took the quiz. The neighbor also was talking to the main person that it was important when the main person was asking why they were doing this unnecessary task..
D. Humor
Because I read the book and its very serious, it does not have humor whatsoever.