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 turtle is slower then a rabbit. Question: If both animals are racing, which one will travel less distance in 5 minutes? (A) rabbit (B) turtle
[EX A]: turtle

[EX Q]: Sentence: John accidentally knocks over two water cups on the table. One is made of glass the other is made of rubber. Question: Which one will break? (A) Rubber Cup (B) Glass Cup
[EX A]: Glass Cup

[EX Q]: Sentence: Tim threw a pebble down the mountain effortlessly, and it was out of site in seconds.  Bob rolled a boulder down the mountain, and after a minute of heaving, it finally descended, gaining speed as it went. Question: Which was heavier? (A) the boulder was heavier (B) the pebble was heavier
[EX A]:
the boulder was heavier