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: Aging is associated with the death of cells., Fact2: When telomeres become too short, the cell dies., Question: What is associated with aging? (A) Extra cells (B) intelligence (C) forest is destroyed (D) Chemical energy (E) Strong cells (F) oxidation reaction (G) Short telomeres (H) massive damage
[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: a solution is formed by one substance being dissolved in another substance, Fact2: Homogeneous mixtures are called solutions., Question: When one substance dissolves in another, the mixture is: (A) unidirectional (B) homogenous (C) It expands (D) Condensation (E) elemental (F) emulsion (G) barrel-shaped (H) separated
[A]:
B