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: Cells that divide uncontrollably may form a tumor, or abnormal mass of cells., Fact2: Cancer is a malignant tumor., Question: Cells that divide uncontrollably may form what? (A) air (B) epidermal (C) fever (D) bacteria (E) cell phones (F) cancer (G) illness (H) water
F