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: Burt is a strong man. His nephew, Dave, is a skinny boy. Question: If they both throw a football, who will throw it further? (A) Burt (B) Dave.

Ex Output:
A

Ex Input:
Sentence: Sam is skating outside. He glides across the dirt with no problem, but falls when he skates on gravel. Question: Which ground has less friction? (A) dirt (B) gravel

Ex Output:
A

Ex Input:
Sentence: Marla is running around the track, while her mom lags behind pushing the baby's stroller. Question: Who take a longer time to make a lap? (A) Marla (B) her mom

Ex Output:
B