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").

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
B

Why animal may use a rock as shelter (A) Centipede (B) Dolphin (C) Seagull (D) Dog
A

What will reflect more light? (A) a black bag (B) a yellow shirt (C) a blue shirt (D) brown shoes

B