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: extreme heat and pressure change rock into metamorphic rock, Fact2: Marble is a form of metamorphic rock., Question: What is formed from extreme heat and pressure? (A) glass (B) marble (C) crust (D) soils (E) coal (F) sugar (G) calcite (H) arteries

Ex Output:
B


Ex Input:
Fact1: wiring requires an electrical conductor, Fact2: Wires connected to a source of electricity., Question: An electrical conductor is required for the operation of: (A) water current (B) electricity (C) satellites (D) energy (E) to move people (F) gas lamps (G) trains (H) lightning

Ex Output:
B


Ex Input:
Fact1: Digestion is the process of breaking down food into components the body can absorb., Fact2: Digestive enzymes are necessary for a complete digestion., Question: What causes food to break down? (A) Blood (B) bacteria (C) Enzymes (D) Saliva (E) sodium (F) heat (G) Esophogus (H) Acids

Ex Output:

C