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.

Example Input: Sentence: Joe and Mike are walking down the same street at the same pace. Question: If Mike walks for one more hour than Joe, who travelled further? (A) Joe (B) Mike.
Example Output: Mike

Example Input: Sentence: Two people were driving to a destination. One person was driving a tank and the other person was driving a car. Question: Which thing was fastest to speed up? (A) The tank (B) a car
Example Output: a car

Example Input: Sentence: Patricia couldn't read in bed very well when she relied on her nighstand lamp, which didn't throw off much illumination from its fixed location. She solved that problem by buying a clip on light which attached directly to the book she was reading and illuminated it beautifully. Question: Which light source was closer to Patricia's book? (A) The nightstand lamp (B) The clip on light
Example Output:
The clip on light