TASK DEFINITION: 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").
PROBLEM: an animal needs to burn complex carbohydrates to (A) stay up (B) move (C) sit (D) sleep

SOLUTION: B

PROBLEM: A good conductor of electricity would be (A) tree (B) coke bottle (C) your finger (D) coke can

SOLUTION: D

PROBLEM: Birds in cold climates ________ by growing thick feathers (A) migrate (B) adapt (C) die (D) reproduce

SOLUTION:
B