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: A full moon is caused by (A) werewolves (B) moonlight (C) tides (D) orbiting
Example Output: D

Example Input: Cellular respiration releases (A) blood (B) waste (C) snot (D) feces
Example Output: B

Example Input: A light bulb turns on when it receives energy from (A) a cable (B) an oven (C) gasoline (D) a person
Example Output:
A