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").
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Question: Fact1: a plants require water for survival, Fact2: Water contains hydrogen and oxygen., Question: What do plants require for their survival? (A) Light (B) Proteins (C) Energy. (D) salinity (E) hydrogen (F) nutrients (G) sunlight (H) food

Answer: E


Question: 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

Answer: H


Question: Fact1: a stem is used to store water by some plants, Fact2: Ferns are vascular plants., Question: What uses stems to store water? (A) bacteria (B) humans (C) Oak (D) rocks (E) trees (F) ferns (G) fens (H) amoebae

Answer:
F