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: The topography of our only natural satellite's surface is (A) smooth (B) made of cheese (C) full of gold (D) mountainous

Output: D


Input: Consider Input: A coral plant will thrive in (A) depths (B) jungles (C) arctic (D) shallows


Output: D