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").

[Q]: Fact1: natural disasters can cause animals to leave an environment, Fact2: Animal migration is mystery of nature., Question: Natural disasters can cause  (A) deforestation (B) kill them (C) Pollution (D) disease (E) deadly (F) erosion (G) migration (H) flooding
[A]: G


[Q]: 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
[A]: B


[Q]: Fact1: medicine is used for curing people when they are sick, Fact2: Medicines, such is ibuprofen, can calm inflammation and ease pain., Question: What is used for curing people when they are sick? (A) ibuprofen (B) enzymes (C) viruses (D) specialized (E) poison (F) Lymph fluid (G) bleach (H) dandelions
[A]:
A