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: telephones are used for communication by two people by transmitting sound, Fact2: Cell phones are, bottom line, radios with a connection to a telephone company., Question: What are used for two people for communication with sound? (A) cell phones (B) messengers (C) energy (D) megaphones (E) A Greek letter (F) flashlights (G) gramophones (H) electricity

A: A
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Q: Fact1: cooking food requires adding heat energy, Fact2: Heat is essentially the source of energy., Question: Doing what to food requires adding the source of energy? (A) burning (B) burying (C) degrading (D) hydration (E) boiling (F) Light (G) sharing (H) cooking

A: H
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Q: Fact1: Hair helps to insulate and protect the body., Fact2: Hair is built by the hair follicle from dead proteins produced by skin cells called keratin., Question: What from dead proteins help to insulate and protect the body? (A) follicles (B) bioaerosols (C) Energy (D) sweating (E) fossil fuels (F) layers of fat (G) fur and fat (H) fungi

A:
A
****