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: chemical weathering causes iron in rock to oxidize, Fact2: Iron oxides are produced that are red, orange, or brown in color., Question: What does chemical weather cause iron to do? (A) Change to rainbow colors (B) flow of electrons (C) contamination (D) Stay the same (E) It gets heated up (F) Plant growth is reduced (G) Change gender (H) Change color to brown
Output:
H