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: animals learn some behaviors from watching their (A) rocks (B) toys (C) caretakers (D) trees
Example Output: C

Example Input: Humming birds may help the growth of (A) cars (B) buildings (C) ants (D) tulips
Example Output: D

Example Input: Plants in an incinerator would (A) petrify (B) freeze (C) wilt (D) cremate
Example Output:
D