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: 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: Jack is in the forest and sees a light shining in the distance. He moves closer to it. Question: When is the light dimmer? (A) when the light is closer (B) when the light is further away

Ex Output:
B

Ex Input:
Sentence: A glider moves at a lower rate of speed through the treetops then through the air. Question: Which surface is smoother? (A) treetops (B) air

Ex Output:
B