Brain tumors occur when what is no longer regulated?\nOptions:\n- (A) fossil fuels\n- (B) headaches\n- (C) voltage\n- (D) heat or cold\n- (E) cell cycles\n- (F) critical organs\n- (G) cerebellum\n- (H) migraines Think carefully first, then make a decision. My thoughts:
User
Cancer is a disease that occurs when the cell cycle is no longer regulated. Brain tumors are one of the fastest growing cancers today. Brain tumors occur when the cell cycle is no longer regulated. So the answer is (E).
Assistant