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: tidal energy can be used to produce electricity, Fact2: Tidal caves are formed by the energy of the rising and falling tides., Question: what can produce electricity? (A) rivers (B) animal transport (C) tidal caves (D) Nematoda (E) rays or beams (F) animals (G) cactuses (H) photons

A: C
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Q: Fact1: astronauts require preserved food for extended flights, Fact2: Most of the Shuttle foods are preserved by dehydration, which saves weight and storage space., Question: astronauts require what food for extended flights? (A) Echinoderm. (B) layers of fat (C) dehydrated (D) fresh (E) hand picked (F) nutrients (G) frozen (H) hydration

A: C
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Q: Fact1: a flashlight requires a source of electricity to produce light, Fact2: Electric power sources are ordinary batteries., Question: What requires a battery to produce light? (A) flashlight (B) energy (C) mirror (D) microscope (E) direct energy (F) fire (G) cactuses (H) glowworm

A:
A
****