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 Q]: Sentence: Tom has recently gotten a prosthetic arm and he notices that it is somewhat stronger than his human arm. Tom tosses a tennis ball to his friend, first with the human arm then with the prosthetic arm. Question: Which arm will toss the ball a shorter distance? (A) Tom's prosthetic arm (B) Tom's human arm
[EX A]: B

[EX Q]: Sentence: Billy and Cody are walking together.  Cody gets tired and sits on a park bench. Question: When they leave the park together, who has walked farther? (A) Cody (B) Billy
[EX A]: B

[EX Q]: Sentence: Asteroids can be huge. But not as big as the sun. Question: Which has a weaker gravity? (A) Asteroid (B) Sun
[EX A]:
A