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 stopwatch is used to measure time, Fact2: Reaction time was measured with a stopwatch in minutes and seconds., Question: What is used to measure minutes? (A) light (B) barometer (C) stopwatch (D) weater (E) thermometer (F) lamphreys (G) feedback (H) sound

Answer: C


Question: Fact1: Biodiversity increases the productivity and stability of ecosystems., Fact2: An ecosystem includes the organisms and their habitat., Question: what does biodiversity increase the productivity and stability of? (A) density (B) the looseness of soil (C) water vapor (D) the environment (E) h2o (F) swamp vegetation (G) biological diversity (H) organisms and their habitat

Answer: H


Question: Fact1: a light bulb requires electrical energy to produce light, Fact2: Black numbers on a white background are easier to see in darkness or bright light., Question: Bulbs produce electrical energy to what? (A) reproduce (B) Change colors (C) rain or sun shine (D) adding heat (E) look at the sun (F) power up cars (G) see in darkness (H) walk through yards

Answer:
G