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: moss causes chemical weathering, Fact2: Chemical weathering is the chemical disintigration of rocks., Question: What causes the chemical disintigration of rocks. (A) trees (B) rivers (C) animals (D) iron (E) wind (F) sand (G) sodium (H) moss
Output:
H