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: Nerves all have (A) microscopic parts (B) short arms (C) viable organs (D) liver transplants
Example Output: A

Example Input: To have energy that will last your whole life you'd buy a (A) car battery (B) loaf of bread (C) turbine (D) tank of gas
Example Output: C

Example Input: Which is likely to provide an undesired acquired characteristic for an organism? (A) a light scratch on its leg (B) learning to leave the nest (C) finding a potential mate (D) dipping a foot in magma
Example Output:
D