You are presented with the question "What can cause cancer by producing mutations in DNA?" and the following answer choices: 
- A drug.
 - Pesticides
 - cigarettes
 - A computer
 - Toxicity
 - jet fuel
 - copper
 - PDAs

Now knowing that most carcinogens cause cancer by producing mutations in DNA and jet fuels are carcinogens, choose the best answer.


 

      jet fuel   