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").
Q: Fact1: Mutations are essential for evolution to occur., Fact2: Evolution Evolution means change over time., Question: What is essential for change over time? (A) Light (B) Chemical energy (C) Essential oil. (D) evaporation (E) Currency. (F) Clocks. (G) colors (H) Mutations.
A:
H