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").

Fact1: smoking tobacco decreases stamina, Fact2: Decreased stamina or stunted growth are two important signs that a murmur is significant., Question: Smoking tobacco can cause what? (A) heart health (B) lymphoma (C) murmur (D) good lungs (E) heart strength (F) cancer (G) disease (H) symptoms
C

Fact1: when a metal rusts , that metal becomes orange on the surface, Fact2: Iron rusts in the presence of oxygen and water., Question: Exposure to oxygen and water can cause iron to  (A) decrease strength (B) melt (C) uncontrollable burning (D) thermal expansion (E) turn orange on the surface (F) vibrate (G) Extremes of temperature (H) levitate
E

Fact1: Gene flow occurs when individuals move into or out of a population., Fact2: Community health focuses on the health of populations or groups., Question: Individuals who move into or out of a community increase: (A) homogeneity (B) energy usage (C) power (D) monoculture (E) competition (F) adding heat (G) population (H) gene flow

H