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: Mike's glass sheet is very brittle, while his phone book is pretty flexible. Question: Which item is more likely to break in two when he flexes it? (A) phone book (B) glass sheet
Example Output: glass sheet

Example Input: Sentence: Thrusting a throwing star into yogurt heats it up less then thrusting it into jelly. Question: Which surface allows the throwing star to reach a higher top speed as it is thrust into it? (A) jelly (B) yogurt
Example Output: yogurt

Example Input: Sentence: Erika is trying to get a paper plane to fly faster and further. She makes one that is heavy, and one that is very light. Question: Which will go faster? (A) light plane (B) heavy plane
Example Output:
light plane