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: Mutation creates new genetic variation in a gene pool., Fact2: Adult genotypes reflect the genes they contribute to the gene pool., Question: Mutation creates new genetic variation in what? (A) Most plants (B) adult people (C) Veins and arteries. (D) chickens (E) adult genotypes (F) peachleaf willow (G) adult arms (H) adult variations
E