instruction:
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").
question:
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
answer:
B

question:
Fact1: fat is used to keep animals warm, Fact2: Humans are a new type of animal., Question: what uses fat to keep warm? (A) Lobsters (B) bacon (C) humans (D) pigeons (E) insects (F) omnivores (G) plants (H) bears
answer:
C

question:
Fact1: Sponges are a source of food for many species of fish., Fact2: Most sponges are sessile., Question: What can be a source of food for many species of fish? (A) Fully cooking the oysters (B) Organic compounds (C) beef (D) fishing poles (E) sessile organisms (F) barnacles (G) grass (H) gastropod shells
answer:
E