How does Robert Frost's use of a first-person speaker in "Mending Wall" help develop the poem's central idea? A. The fact that readers are only provided with the speaker's feelings and perspective helps to stress the idea that he and his neighbor do not see things the same way. B. Since readers know the speaker's emotions, Frost can stress the idea that those who choose to live in isolated areas often develop strange beliefs and customs. C. The fact that readers must guess at what the neighbor wants to do with the wall helps reinforce the idea that both men think rebuilding the wall is pointless. D. Since readers can understand the speaker's inner thoughts and feelings, Frost can show how much the speaker resents his neighbor for wrecking their shared wall.