Instructions: 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.
Input: Sentence: Pushing a safety pin into thin paper is easier then pushing it into thick paper. Question: Which paper will allow the safety pin to plunge into it at a faster rate of speed? (A) thick paper (B) thin paper
Output:
thin paper