You will be given a definition of a task first, then some input of the task.
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").

If you are feeling cold, its a good idea to go for a run or even a brisk walk because as you move, your energy is turned into what? (A) Dogs (B) warmth (C) icicles (D) money
Output:
B