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 Input:
Fact1: coal is used for generating heat by burning, Fact2: Gasoline is extremely flammable and can explode and burn if ignited., Question: coal is used for generating heat and can what? (A) melt (B) explode (C) run (D) kill (E) heat (F) energy (G) stay warm (H) freeze

Ex Output:
B

Ex Input:
Fact1: a prism is used for refracting light, Fact2: Refraction is the bending of light cause by a speed change when it passes through different media., Question: What aspect of light changes when it passes from air into a prism? (A) power (B) seasons (C) speed (D) energy (E) a wave (F) Joules (G) heat (H) unique

Ex Output:
C

Ex Input:
Fact1: crumple means change shape from smooth into compacted by physical force, Fact2: Crumple the foil then carefully reopen it., Question: what can be changed from smooth to compacted by physical force? (A) Roads (B) dirt (C) h2o (D) soils (E) foil (F) wood (G) oxygen (H) hair

Ex Output:
E