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: All chemical reactions require activation energy to get started., Fact2: Fire is a chemical reaction., Question: What does fire require to get started? (A) an engine (B) activation energy (C) water (D) energy usage (E) direct energy (F) dogs (G) activated almonds (H) adding heat
[A]: B

[Q]: Fact1: high pressure systems cause clear weather, Fact2: Weather Clear weather usually means good visibility., Question: what does a high pressure system cause? (A) hyperthyroidism (B) lowered energy cost (C) harmful substances (D) Heart rate (E) good visibility (F) It gets heated up (G) Pollution (H) rainfall
[A]: E

[Q]: Fact1: Some viruses live in a dormant state inside the body., Fact2: Humans have bodies., Question: what do some viruses live in a dormant state inside? (A) alveoli (B) Epidermis (C) clouds (D) plants (E) HIV (F) animals (G) humans (H) volume
[A]:
G