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: A glacier moved through an area years and years ago, and scientists can tell this by (A) looking at the moon (B) looking at the dogs (C) looking at the sky conditions (D) glancing at nearby stone
Example Output: D

Example Input: what do animals need to protect them from bad weather? (A) housing (B) food (C) water (D) clothing
Example Output: A

Example Input: When writing with an instrument one sharpens, the leftovers when pressed to paper is (A) a squid (B) glowing (C) a mineral (D) bright white
Example Output:
C