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: if gas is heated then that gas will expand, Fact2: An increase in temperature causes a gas to expand., Question: what affects a gas? (A) electricity (B) kinetic energy (C) temperature (D) Evaporation (E) salinity (F) Pollution (G) wind (H) magnetism

A: C
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Q: Fact1: matter vibrating can cause sound, Fact2: Thus, sound is a wave in air ., Question: what can matter vibrating cause? (A) Pollution (B) energy (C) Relieve pain (D) kinetic energy (E) wave in air (F) Energy. (G) murmur (H) Greenhouse gases

A: E
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Q: Fact1: the moon revolving around the Earth causes the phases of the moon, Fact2: Tides are cyclical and closely follow the phases of the moon., Question: What occurs in water as the moon revolves around Earth? (A) tides (B) gravity (C) liquid (D) energy (E) pollution (F) heat (G) earthquakes (H) erosion

A:
A
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