Which excerpt from "Mending Wall" best conveys the poem's theme?


A.

"Before I built a wall I'd ask to know / What I was walling in or walling out . . ."


B.

"We keep the wall between us as we go."


C.

"Good fences make good neighbors."


D.

"We have to use a spell to make [the stones] balance: / 'Stay where you are until our backs are turned!'"