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.

Sentence: A toilet paper roll sliding along a living room floor gets hotter then one sliding across a bathroom floor. Question: Which surface has the most friction? (A) bathroom floor (B) living room floor
living room floor