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: Fertilization occurs when sperm swim to an egg inside an archegonium., Fact2: Fertilization occurs when the egg and sperm fuse and join., Question: What happens in the archegonium? (A) eggs separate (B) Earth orbiting the Sun (C) sperm and egg fuse (D) competition (E) fallopian tubes join (F) permineralization (G) It expands (H) cloning
A:
C