You will be given a definition of a task first, then some input of the task.
In this task, you are given two facts, and a multiple-choice question. Based on the given facts, answer the question with index of the correct option (e.g, "A").

Fact1: shelter is used for protection by animals against weather, Fact2: Many snakes seek shelter from the winter weather by holding up in dens., Question: Why does a snake look for shelter in the winter? (A) Protection (B) Food (C) adding heat (D) Water (E) When it's cold (F) Darkness (G) energy barrier (H) hydration
Output:
A