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: 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: All animals are heterotrophs., Fact2: Heterotrophic bacteria derive energy from the breakdown of organic molecules., Question: What derive energy from the breakdown of organic molecules? (A) Most plants (B) hydrocarbons (C) potatoes (D) all stones (E) all water sources (F) all mountains (G) all animals (H) Generating heat
[EX A]: G

[EX Q]: Fact1: hibernation is used for conserving energy by some animals, Fact2: Energy conservation is an important survival trait., Question: What is used as an important survival trait by some animals? (A) bleeding (B) lying (C) hormones (D) food and shelter (E) hibernation (F) four limbs (G) proteins (H) crying
[EX A]:
E