Given the task definition and input, reply with output. 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: Sarah brushed her hair. Some fell off and turned into a hairball on the bathroom rug. Then Joe walked across the bathroom. The hairball moved a foot across the rug. then it moved a few inches across the pile of laundry next to the rug. Question: On which of these areas did the hairball encounter more friction? (A) bathroom rug (B) pile of clothes
pile of clothes