Fact 1: Cancer is a disease that occurs when the cell cycle is no longer regulated.

Fact 2: Cancer is also caused by a mutation.

Given the two facts above, answer the question "What is a result of when the cell cycle is no longer regulated?" with the following options: 
- anemia
 - Smoking
 - Dehydration
 - fever
 - Pollution
 - mutation
 - radiation
 - bacteria


 

      mutation   