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: Fertilization occurs when sperm swim to an egg inside an archegonium., Fact2: When a sperm cell fertilizes an egg cell, a fertilized egg or zygote is formed., Question: Where is a zygote formed by sperm swimming to an egg? (A) colder and wetter (B) ocean water (C) graptolites (D) rapid expansion (E) a delta (F) an archegonium (G) barnacles (H) an organism's body
Output:
F