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: Gymnosperms are vascular plants that produce seeds in cones., Fact2: Gymnosperms are the plants that are known as evergreens., Question: What are vascular plants that produce seeds in cones? (A) evergreens (B) it needs them (C) Leptospirosis (D) epidermal (E) Conifers (F) white (G) Newton (H) more abundant
[EX A]: A

[EX Q]: Fact1: Mating is generally preceded by courtship., Fact2: For example, a black rooster and a white hen mate, and the resulting offspring are gray., Question: What can result in offspring? (A) seeds (B) competition (C) courtship (D) travel (E) resistance (F) solitude (G) litter (H) reading
[EX A]: C

[EX Q]: Fact1: the emission of sulfur dioxide causes acid rain, Fact2: It's sulfur dioxide (SO2)., Question: The emission of what causes acid rain? (A) H2O (B) smoke from food (C) Hydrogen (D) coal (E) SO2 (F) oil (G) CFCs (H) Cars
[EX A]:
E