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 energy is renewable ., Question: What can renewable energy be used for? (A) Creating more fossil fuels (B) health (C) Quality of life (D) Measuring water (E) Global warming (F) root growth (G) Electricty (H) staying warm
[A]: G

[Q]: Fact1: when a metal rusts , that metal becomes orange on the surface, Fact2: Iron rusts in the presence of oxygen and water., Question: Exposure to oxygen and water can cause iron to (A) decrease strength (B) melt (C) uncontrollable burning (D) thermal expansion (E) turn orange on the surface (F) vibrate (G) Extremes of temperature (H) levitate
[A]: E

[Q]: Fact1: Cnidarians are invertebrates such as jellyfish and corals., Fact2: Cnidarians are also called coelenterates., Question: What group contains animals that include jellyfish and corals? (A) sea anemones (B) plants (C) Vibrissae (D) corals (E) coelenterates (F) sponges (G) holding nutrients (H) prokaryotic cells
[A]:
E