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: Cancer is a disease that occurs when the cell cycle is no longer regulated., Fact2: Cancer is a defect in regulation of the cell cycle., Question: cancer is a defect that occurs when there is no longer regulation of what? (A) injections (B) breathing (C) disease (D) cycles (E) glucose (F) the skin (G) Energy (H) attitude
D