Given the task definition and input, reply with output. 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").

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
D