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: Karen was playing football at the park. She threw the ball and it hit the ground, rolled on the field, and then rolled into a gravel playground. The ball generated more heat when it rolled over the gravel. Question: Which surface is more level? (A) field (B) gravel
Example Output: A

Example Input: Sentence: Greg and Lisa both live 2 miles from the library. Greg takes off on foot. Lisa uses a scooter. Question: Who gets there first? (A) Greg (B) Lisa
Example Output: B

Example Input: Sentence: Mary's ice cream has an easy time sliding around in a bowl, but a hard time sliding around in a cone. Question: Which surface will make the ice cream melt faster? (A) cone (B) bowl
Example Output:
A