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").

Input: Consider Input: Fact1: Active immunity results when an immune response to a pathogen produces memory cells., Fact2: Vaccination is Active Acquired Immunity., Question: What results when an immune response to a pathogen produces memory cells? (A) anemia (B) vaccination (C) kill them (D) competition (E) lie detectors (F) rapid expansion (G) killing insects (H) it needs them

Output: B


Input: Consider Input: 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

Output: B


Input: Consider Input: Fact1: Mammals conserve body heat with their hair or fur., Fact2: Coyotes classified as fur-bearing mammals., Question: How do coyotes conserve body heat? (A) They have webbed feet (B) sweating (C) With their fur (D) Having no hair (E) Exfoliation (F) storing water (G) Running really fast (H) Shivering


Output: C