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: You can eventually obtain water from a lake even if it's (A) frozen (B) gone (C) evaporated (D) dry
Example Output: A

Example Input: Webbed feet aid in what (A) penguins laying eggs on ice (B) fish hiding in coral reefs (C) gulls dive bombing fish from the sea (D) ducks chasing prey underwater
Example Output: D

Example Input: Two birds in completely different houses can discuss something by (A) sitting (B) thinking (C) vocalizing (D) sleeping
Example Output:
C