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.

[EX 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
[EX A]: clean tooth

[EX Q]: Sentence: Davy's baby girl was crawling on the Living Room floor. Suddenly, his small Dalmation puppy raced by her, running into the Dining Room, into the Kitchen, and all the way back before his daughter had even reached the couch. Question: Who was moving more slowly? (A) the baby (B) the puppy
[EX A]: the baby

[EX Q]: Sentence: War Emblem stopped from a brisk trot to greet Northern Dancer, who had been standing still and contently grazing in the pasture. Question: Which horse would be sweating more? (A) War Emblem (B) Northern Dancer
[EX A]:
War Emblem