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: Organisms with only one cell (A) are prohibited from specializing (B) can freely specialize openly (C) are unsure what specializing is (D) learn how to specialize
Example Output: A

Example Input: If I wanted to make something move faster I could (A) slow it down (B) stomp on it (C) stop it (D) roll it
Example Output: D

Example Input: I can see melting occur when (A) cleaning the bathroom (B) I bake macaroni (C) I run around (D) sewing a dress
Example Output:
B