How does the conversation between the two men, particularly regarding the phrase "Good fences make good neighbors," relate to the theme of protecting oneself?

A The neighbor and the speaker both believe in the supremacy of self$-$protection

B The neighbor and the speaker both agree that fences need to be mended at all costs.

The neighbor thinks fences need to be mended; the speaker thinks they should stay as they are.

The neighbor believes in self$-$protection; the speaker wonders if it might sometimes be good to open up to others.