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: melting means changing from a solid into a liquid by adding heat energy, Fact2: Ice is the solid form of water., Question: What changes ice to water by adding heat energy? (A) mussels (B) melting (C) freezing (D) fertilization (E) storms (F) boiling (G) engines (H) condensation

Ex Output:
B


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: competition may cause animals to fight towards members of their own species, Fact2: Competition between male animals is common in nature., Question: What is common in males of the same species? (A) competition (B) dancing (C) mating (D) traits (E) females (F) biceps (G) Allergies (H) hormones

Ex Output:

A