Which excerpt from "mending wall" best conveys the poem's theme?

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

b."good fences make good neighbors."

c."before i built a wall i'd ask to know / what i was walling in or walling out . ."

d."we have to use a spell to make [the stones] balance: / 'stay where you are until our backs are turned! '"

Read the following passage and explain how wiesel interrupts the narration of the story to emphasize the truth behind what eliezer witnesses. "not far from us, flames, huge flames, were rising from a ditch. something was being burning there. a truck drew close and unloaded its hold: small children. babies! yes, 1 did see this, with my own children thrown into the frames. (is it any wonder that ever since then, sleep tends to elude me? )"