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: carpooling decreases the amount of cars used to travel to a place, Fact2: Carpooling cuts down on congestion and pollution., Question: What decreases when we decrease the amount of cars traveling to one place? (A) Temperature (B) Heart rate (C) Climate change (D) Pollution (E) Clean air (F) forces (G) Burning fossil fuels (H) gene flow
[A]: D

[Q]: Fact1: Mammals can also generate little bursts of heat by shivering., Fact2: Polar bears are mammals., Question: What can generate little bursts of heat by shivering? (A) alpacas (B) bacteria (C) animals (D) polar bears (E) phytoplankton (F) rabbit (G) viruses (H) humans
[A]: D

[Q]: Fact1: Populations of viruses do not grow through cell division because they are not cells., Fact2: Cancer is unregulated cell division., Question: What is one thing viruses do not cause? (A) disease (B) AIDS (C) illness (D) cancer (E) Ebola (F) fever (G) death (H) smallpox
[A]:
D