You are given a sentence, a question and two answer options ('A' and 'B'). Your task is to find the correct option for the given question. Write down the answer index: 'A' or 'B'.

Example Input: Sentence: A matchbox can slide across a greenhouse floor, but it doesn't move as fast as when it is slid across the backyard. Question: Which surface is the smoother one? (A) greenhouse floor (B) backyard
Example Output: A

Example Input: Sentence: Mary knows that her magazine is more flexible then her board. Question: Which item is most likely to break when she bends it? (A) magazine (B) board
Example Output: B

Example Input: Sentence: Mike is standing closer to a flashlight then to a lamp. Question: Which object seems brighter to him? (A) flashlight (B) lamp
Example Output:
A