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: Deserts are in extremely dry environments, so liquids will naturally be (A) rainbow (B) plentiful (C) meager (D) talented
Example output: C
Example explanation: This is a good example and the output correctly answers the question.
Q: What can cause animals to leave an environment? (A) grass (B) abundant food (C) earth tremors (D) natural winds
A:
C