Definition: 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").
Input: Fact1: Sperm had to swim from male to female reproductive organs for fertilization., Fact2: Sperms swim with their tails., Question: Something that swims from male to female reproductive organs for fertilization uses what to move? (A) Energy (B) Tail (C) Brain (D) seeds (E) Legs (F) Arms (G) a path (H) heat
Output:
B