Cancer can strike anyone and at any time in a person's life. Cancer also can strike any organ or organ system. However, the risk of developing cancer varies with age, and it varies from person to person. Many types of cancer are more common in some families than others, which means that genes play a role. Other cancers are linked to the environment. What is Cancer ?

A. A mutation in a gene that decreases cell devision

B. Uncontrolled Mitosis

C. Uncontrolled Meiosis

D. A bacterial infection that causes swelling in body tissue