In this task, you are given a multiple-choice question and you have to pick the correct option. Answer with option indexes (i.e., "A", "B", "C", and "D").

Example Input: When will the humidity increase in relation to bodies of water? (A) when you get closer (B) when you are shooting (C) when you get farther (D) when you are laughing
Example Output: A

Example Input: Birds sometimes eat what? (A) grass (B) underground crawlers (C) insecticide (D) trees
Example Output: B

Example Input: The water treatment plant boiled all the water that came to them for what reason? (A) add oxygen (B) add health benefits (C) to eliminate substances (D) mix the water
Example Output:
C