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").

Input: Consider Input: In a zoo, a polar bear exhibit will contain (A) salt (B) cacti (C) strong fans (D) sand

Output: C


Input: Consider Input: the presence of which of these is required for the formation of cavernous chambers? (A) some carbonated soda (B) some carbon dioxide (C) some carbonic acid (D) carbon monoxide gas

Output: C


Input: Consider Input: A pony is living in a small barn and its owner dies and the pony is unable to fend for itself. The pony dies because (A) it is elderly (B) it is bored (C) it is vital (D) it required nutriment


Output: D