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: Harold learned in school that Uranus has a greater mass then Mercury. Question: This means that which planet emits stronger gravity? (A) Uranus (B) Mercury
Example Output: A

Example Input: Sentence: Carrie visits Dina at her house. Dina rides her exercise bike while Carrie sits and watches television. Question: Which of the two will have a smaller pool of sweat at their feet when they are done? (A) Carrie (B) Dina.
Example Output: A

Example Input: Sentence: A girl slides a game piece across the gameboard, then across across the carpet. He notices the game piece shows more resistance against the carpet. Question: Which surface allows the game piece to slide faster with the same force? (A) the gameboard (B) the carpet?
Example Output:
A