Given the task definition and input, reply with output. 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.

Sentence: John looked up and saw both the sun and moon in the sky. The sun was closer to him then the moon was. Question: Which object appeared brighter to him? (A) sun (B) moon
sun