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: adding a direct flame to container of acid causes a (A) dormant cycle (B) lot of nothing (C) lower temperature (D) vapor expulsion
Example Output: D

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: Every one of these would be considered a fossil but what? (A) a mammoth bone that has been turned to rock (B) the imprint of a sea creature in a rock found on a mountain (C) a cave full of old drawings (D) a paw print in a rock
Example Output:
C