Definition: 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: Violet was rolling an eggplant around the kitchen. She noticed that when she rolled it across the kitchen rug, the eggplant went slower than when she rolled it across the wooden cutting board. Question: She realized that this happened because which surface was smoother? (A) cutting board (B) kitchen rug
Output:
cutting board