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 Q]: Fact1: harming an animal species has a negative impact on the population size of that species, Fact2: Sometimes hunting can impact animal populations., Question: What does hunting do to a species? (A) Plant growth is reduced (B) Decreases population (C) protect them (D) cause their death (E) Creates demand for the species (F) Strengthens the species (G) massive damage (H) Increases population
[EX A]: B

[EX Q]: Fact1: the emission of sulfur dioxide causes acid rain, Fact2: The sulfur dioxide is converted into sulfuric acid., Question: what causes acid rain? (A) gases (B) rainfall (C) Pollution (D) fossil fuels (E) emissions (F) vehicles (G) burning (H) wind
[EX A]: E

[EX Q]: Fact1: Cells have multiple repair mechanisms to fix mutations in DNA., Fact2: DNA damage is called mutation., Question: What do cells have multiple repair mechanisms to repair? (A) Veins and arteries. (B) damage to DNA (C) a cuticle (D) animals (E) mammals (F) peachleaf willow (G) gastropod shells (H) an organism's body
[EX A]:
B