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 mirror is used for reflecting light, Fact2: Light seems to travel in rays or beams., Question: what can a mirror be used to reflect? (A) noble gases (B) air particles (C) glass (D) focusing a lens (E) rays or beams (F) photons (G) sun's heat (H) an electron lens

Answer: E


Question: Fact1: Most people can survive only a few days without water., Fact2: Water is the best fluid for hydration., Question: What can people only survive a few days without? (A) dehydration (B) hydration (C) bacteria (D) sodium (E) food (F) yogurt (G) Chlorophyll (H) oxygen

Answer: B


Question: Fact1: a light bulb requires electrical energy to produce light, Fact2: Energy-saving light bulbs are essentially fluorescent light bulbs., Question: Energy-saving is important when electrical energy is used to produce what (A) sound (B) a stove (C) crops (D) light (E) oil (F) motion (G) Heat (H) waves

Answer:
D