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 baby experiences less friction crawling in his playpen then crawling in the living room. Question: Which surface will force the baby to crawl at a lower rate of speed? (A) playpen (B) living room
A:
living room