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: cellular respiration is when a cell converts from oxygen and carbohydrates into carbon dioxide, water, and energy, Fact2: Cellular respiration occurs in the mitochondria., Question: Where does a cell convert oxygen and carbohydrates into carbon dioxide, water, and energy?  (A) Most plants (B) aerobic capacity (C) In the mitochondria (D) the body's largest organ (E) they body they live in (F) Veins and arteries. (G) Organic compounds (H) circulatory systems
[A]: C


[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: Male dogs use pheromones in urine to mark their territory., Fact2: Pheromones are chemicals produced by insects to communicate., Question: What uses chemicals in urine to mark their territory? (A) rabbit (B) bears (C) viruses (D) male dogs (E) alpacas (F) athletes (G) humans (H) bacteria
[A]:
D