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: Evolution occurs by a process called natural selection., Fact2: Adaptation is the result of natural selection., Question: evolution occurs by a process that results in what? (A) animals (B) adaptation (C) unnatural selection (D) Plants growth (E) evolution stopping (F) supernatural spirits (G) rapid expansion (H) competition
B