You are given a sentence, a question and two answer options ('A' and 'B'). Your task is to find the correct answer (return the string of the correct option, not 'A' or 'B') for the given question.

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

A: Tom's human arm
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Q: Sentence: Minnie can choose between two trains for her travel. The red train and the blue train both go the same speed, but the red train travels for less time than the blue train. Question: Which train travels less distance? (A) red train (B) blue train

A: red train
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Q: Sentence: A dirty tooth isn't as smooth as a clean tooth. Question: Which surface will a toothbrush move over at a greater rate of speed? (A) dirty tooth (B) clean tooth

A:
clean tooth
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