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 Input:
Sentence: A bagel that is slid across a lunch tray moves slower then a bagel slid across a lunch counter. Question: Which surface will make the bagel heat up the least? (A) lunch counter (B) lunch tray

Ex Output:
lunch counter

Ex Input:
Sentence: John rolled a large ball and a small ball at the same time. Question: Which will roll further faster? (A) large ball (B) small ball

Ex Output:
large ball

Ex Input:
Sentence: Lucy could see smoke in the distance. She heard a fire engine's siren and it sounded loud. Then she heard the sirens from a police car, but the sound was much harder to hear. Question: Which was closer to Lucy? (A) the fire engine (B) the police car

Ex Output:
the fire engine