Fact 1: Mutations that lead to cancer usually occur in genes that control the cell cycle.

Fact 2: Radiation destroys cells and can cause genetic mutations.

Given the two facts above, answer the question "Which of the following can cause cancer?" with the following options: 
- Birth defects
 - Smoking
 - cigarettes
 - radiation
 - Malnutrition
 - Pesticides
 - rays or beams
 - cancer pills


 

    radiation     