You are given a sentence, a question and two answer options ('A' and 'B'). Your task is to find the correct answer (return the string of the correct option, not 'A' or 'B') for the given question.
Q: Sentence: A banjo slides at a low rate of speed across a porch swing, but a high rate of speed across the porch of Mike's old house. Question: Which surface is going to give the banjo a rougher ride? (A) porch swing (B) porch
A:
porch swing