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").

[EX Q]: Fact1: Fertilization occurs when a sperm and an egg fuse., Fact2: Pregnancy begins with a fertilized egg., Question: what begins when a sperm and an egg fuse? (A) Leptospirosis (B) cellular regeneration (C) h2o (D) seeds (E) death (F) pollen (G) pregnancy (H) competition
[EX A]: G

[EX Q]: Fact1: Behaviors that improve fitness increase through natural selection., Fact2: Fitness traits relate to an animal s ability to survive and reproduce., Question: behaviors increase through what that improve traits of animal's ability to survive (A) competition (B) hunting (C) biological diversity (D) the environment (E) eating (F) produce offspring (G) natural selection (H) grooming
[EX A]: G

[EX Q]: Fact1: a greenhouse is used to protect plants from the cold, Fact2: Protect cold-sensitive plants from winter wind., Question: what does a greenhouse protect plants from? (A) deforestation (B) Dehydration (C) massive damage (D) influenza (E) colder weather (F) disease (G) toxins (H) winter wind
[EX A]:
H