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: microorganisms can cause infections, Fact2: Bacteria are microorganisms that exist everywhere., Question: What can cause infection? (A) bacteria (B) seeds (C) influenza (D) disease (E) horses (F) viruses (G) chickenpox (H) bladders
[A]: A

[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: burning wood is used to produce heat, Fact2: Heat is added and the temperature of the water increases., Question: What is used to increase temperature? (A) activation energy (B) ice (C) electricity (D) snow (E) glaciers (F) burning wood (G) Electrical energy (H) Fuel cells
[A]:
F