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").

Input: Consider Input: A learned behavior is exhibited when (A) squinting in bright light (B) nailing up a picture frame (C) blinking and gulping air (D) inhaling and exhaling during sleep

Output: B


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

Output: A


Input: Consider Input: a reptile that was brown an hour later is now green because (A) red paint was poured over it (B) it's green with envy (C) it's sitting in a leafy shrub and using camouflage (D) it is feeling nauseous


Output: C