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: Evolution occurs in response to a change in the environment., Fact2: Animals react instinctively to changes in their environment., Question: What occurs in animals as they respond to changes in their habitat? (A) starvation (B) evolution (C) arousal (D) relocation (E) resistance (F) dependency (G) Leptospirosis (H) Movement
B

Fact1: Active immunity results when an immune response to a pathogen produces memory cells., Fact2: Pathogens are germs that cause disease., Question: Active immunity is when an immune response occurs after a germ produces what? (A) harmful substances (B) bioaerosols (C) rapid expansion (D) Allergies (E) anemia (F) it needs them (G) Chemical energy (H) memory cells
H

Fact1: Mutation creates new genetic variation in a gene pool., Fact2: Genetic variation is the raw material for evolution., Question: Mutation leads to _. (A) Devolution (B) Plants growth (C) rapid expansion (D) Evolution. (E) Degeneration (F) Extinction (G) massive damage (H) anemia

D