You will be given a definition of a task first, then some input of the task.
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: Sam is standing in an underground tunnel. It's pretty dim where he is but he can spot two lights. The light to the west appears brilliant, and the light to the east appears pretty dim. Question: If he wants to walk to the closest light, which was should he go? (A) east (B) west
Output:
west