Definition: 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").
Input: Fact1: shelter is used for protection by animals against weather, Fact2: Acid rain can be especially harmful to plants and animals., Question: What protects creatures from harmful rain? (A) stars (B) Conifers (C) shelter (D) Frogs. (E) clouds (F) moon (G) Frogs (H) the skin
Output:
C