Answer the following question given this paragraph: 

Cancer is a disease in which cells grow out of control and form abnormal masses of cells. It is generally caused by mutations in genes that regulate the cell cycle. Because of the mutations, cells with damaged DNA are allowed to divide without limits. Cancer genes can be inherited. You can learn more about hereditary cancer by watching the video at the following link: http://www. youtube. com/watch?v=LWk5FplsKwM (4:29).


Q: What is the disease in which cells grow out of control and form abnormal masses?

 Choices:

- bronchitis

- diabetes

- HIV

- cancer

A:
cancer
