I'm pretty sure it's D. The speaker's neighbor said "good fences make good neighbors", meaning that he believes that good neighbors need some distance from each other.
Option D. In the poem "Mending Wall", the speaker's neighbor believes that good neighbors keep a certain amount of distance from each other.
Explanation:
In the poem written by Robert Frost, the speaker and his neighbor are fixing the wall that separates both of their properties, when the speaker starts to question whether the wall is needed in the first place. As the speaker keeps on bringing different reasons as to why the wall is unnecessary, the neighbor keeps on repeating the phrase "good fences make good neighbors". The poem illustrates the difference between a more progressive person, as it is the speaker, and a more traditional one, as it is the neighbor who believes that good neighbors keep a certain amount of distance from each other.
