Answer the following question given this paragraph: 

Cell division is just one of the stages that all cells go through during their life. This includes cells that are harmful, such as cancer cells. Cancer cells divide more often than normal cells, and grow out of control. In fact, this is how cancer cells cause illness. In these concepts, you will read about how cells divide, what other stages cells go through, and what causes cancer cells to divide out of control and harm the body.


Q: All cells undergo what during a lifetime, but when this process is out of control, cancer results?

 Choices:

- cell transition

- cell death

- cell mutation

- cell division

A:
cell division
