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: Insects may live in large colonies and have complex social behaviors., Fact2: Like other ants, the fire ant is a social insect., Question: What may live in large colonies? (A) animals (B) tigers (C) tardigrades (D) fire ants (E) bears (F) honeybees (G) orchids (H) graptolites
[EX A]: D

[EX Q]: Fact1: coal is used for generating heat by burning, Fact2: Gasoline is extremely flammable and can explode and burn if ignited., Question: coal is used for generating heat and can what? (A) melt (B) explode (C) run (D) kill (E) heat (F) energy (G) stay warm (H) freeze
[EX A]: B

[EX Q]: Fact1: Amphibians are the first true tetrapods, or vertebrates with four limbs., Fact2: Frogs are classified as amphibians., Question: _ are tetrapods. (A) animals (B) amoeba (C) Frogs (D) Length (E) insects (F) Spiders (G) Snakes (H) Birds
[EX A]:
C