Why does the neighbor say that "good fences make good neighbours" in "Mending Wall"?

A) He does not like the poem's speaker.

B) He doesn't want cows in his fields.

C) He is worried about people being on his land.

D) He is repeating what his father used to say.

(Not B)

In my opinion, the correct answer is D) He is repeating what his father used to say. The neighbor is an embodiment of the traditions that restrict and confine people within walls, keeping them away from each other. The neighbor even repeats this phrase, as if it was an age-old adage that passes on from fathers to sons, or as if it were a mantra that, in a way, keeps him safe. The speaker obviously wants to change this pattern.