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").

[EX Q]: Fact1: insulated material can be used for keeping warm, Fact2: An insulated cup with a cover is great for keeping beverages warm., Question: How do you keep a cup hot? (A) less water (B) electricity (C) heat energy (D) adding heat (E) energy usage (F) insulation (G) squeeze (H) energy
[EX A]: F

[EX Q]: Fact1: moss causes chemical weathering, Fact2: Mosses Mosses are flowerless plants that grow in clumps., Question: What can cause chemical weathering? (A) Calcium carbonate (B) our nearest star (C) global warming (D) sea squirts (E) swamp vegetation (F) single-celled organisms (G) flowerless plants (H) Earthworms
[EX A]: G

[EX Q]: Fact1: a laser is used for producing light, Fact2: Also, very powerful, high concentration lasers can burn or cut the skin., Question: What can burn the skin? (A) cream (B) light (C) ointment (D) the sun (E) Lukewarm water (F) cigars (G) Acids (H) NaCl
[EX A]:
B