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: hydropower requires damming a river, Fact2: Another source of energy is hydropower., Question: What is a source of energy? (A) fossil fuels (B) cooking (C) damming a river (D) sleeping (E) napping (F) Electrical energy (G) our nearest star (H) sunlight
[A]: C

[Q]: Fact1: a mold spore has a negative impact on the respiratory system, Fact2: Insects also have both a heart and a respiratory, or breathing, system., Question: Mold spores have what impact on breathing? (A) neutral (B) ambiguous (C) symptoms (D) motility (E) positive (F) dangerous (G) negative (H) uncontrolled
[A]: G

[Q]: Fact1: a scale is used for measuring weight, Fact2: Dimensions are in inches, weights in pounds., Question: What can measure pounds? (A) animals (B) lamphreys (C) a mouse (D) a ruler (E) humans (F) surveyor (G) a scale (H) a microscope
[A]:
G