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: 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

Ex Output:
B


Ex Input:
Fact1: Cells are the basic units of the structure and function of living things., Fact2: All cells use glucose for energy., Question: What do all living things use for energy? (A) fish (B) kids (C) energy (D) glucose (E) The Sun (F) procreation (G) sunlight (H) food

Ex Output:
D


Ex Input:
Fact1: scraping oneself on a contaminated object may cause infection, Fact2: Infection is a major pathway to ultimate amputation., Question: A possible outcome of scraping oneself on a contaminated object? (A) hyperthyroidism (B) hypothyroidism (C) chemical reaction (D) chemical changes (E) limb amputation (F) Decrease bodily water (G) sweating (H) decrease stamina

Ex Output:

E