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 Input:
Sentence: A plunger gets a lot hotter plunging through a clogged toilet then plunging through a clean toilet. Question: Which surface will let the plunger go a greater distance per push? (A) clogged toilet (B) clean toilet

Ex Output:
clean toilet

Ex Input:
Sentence: Dana needs some shoelaces for her running shoes and she wants to make sure they won't break. She has blue shoelaces that look flimsy and green shoelaces that look more bulky. Question: Which shoelaces would be more likely to snap? (A) the blue shoelaces (B) the green shoelaces

Ex Output:
the blue shoelaces

Ex Input:
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

Ex Output:
Billy