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: Mary and Billy are at the beach skipping rocks.  Billy works out everyday, but Mary is weaker. Question: Who can throw the rocks farther? (A) Mary (B) Billy

Answer: Billy


Question: Sentence: Annabel rolls a pomegranate down two boards, one with knots and one without. When it rolls down the board without knots, it has less friction than when it rolls down the board with knots. Question: Which board is rougher? (A) wood board with knots (B) wood board without knots

Answer: wood board with knots


Question: Sentence: Sliding a shirt across the floor makes it heat up less then sliding it across the bed. Question: This means that the shirt can slide a greater distance across which surface? (A) bed (B) floor

Answer:
floor