instruction:
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.
question:
Sentence: Frank was dragging a heavy log across the yard. His twin brother Fred was dragging one that weighed only half as much. Question: When the work was through, who had lost more perspiration? (A) Frank (B) Fred
answer:
Frank


question:
Sentence: Joe and Mike are throwing rocks at the lake. Question: If Mike is a lot stronger than Joe, who will be more likely to throw a rock further? (A) Joe (B) Mike.
answer:
Mike


question:
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
answer:

glass sheet