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: Jim and Bryan have both left their office and are driving down the highway at the same speed. However, Bryan lives closer to the office than Jim does. Question: Who travels the least distance? (A) Jim (B) Bryan
Example Output: B

Example Input: Sentence: Major Tom, an astronaut, used to jump up and down on Earth, and he never got higher than a meter in the air. When his ship landed on Ceres, he jumped up and kept going and going higher and higher. Question: Why? (A) Earth has greater mass (B) Ceres has greater mass
Example Output: A

Example Input: Sentence: A shopping cart rolls by itself across a parking lot. Then it gets to a field. The cart rolls only a little more after it enters the field. Question: Why does this happen? (A) the parking lot is a rougher surface (B) the field is a rougher surface
Example Output:
B