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: Three spelunkers are exploring a huge canyon. They are all far from one another. Henry can see the headlights from his friends, Betty and Dave. Betty's light appears to be brighter than Dave's. Question: Which of his friends is he closer to? (A) Betty (B) Dave
Output:
Betty