Given the task definition and input, reply with output. 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: rocks interacting with wind over long periods of time causes weathering, Fact2: Hurricanes are made of wind., Question: What causes weathering? (A) wildlife (B) evaporation (C) cotton (D) ocean water (E) light (F) salt and water. (G) hurricanes (H) erosion
G