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'.

Ex Input:
Sentence: Bernie is pitching marbles. He notices that when he pitches the marbles on the tile in his kitchen, the marble goes faster and farther away than when he does the same action on grass. Question: Which surface is applying less friction to the marble? (A) grass (B) tile?

Ex Output:
B


Ex Input:
Sentence: David and Joe live together and go out at the same time. David drove his car and Joe rode his skateboard. Question: After one hour, who traveled less distance? (A) David (B) Joe

Ex Output:
B


Ex Input:
Sentence: Ian rolls two balls down a sidewalk at the same time. One is red, the other is white. The white ball goes further than the red one. Question: Which ball went slower? (A) white ball (B) red ball

Ex Output:

B