Fact 1: Most carcinogens cause cancer by producing mutations in DNA. Fact 2: Jet fuels are carcinogens. Given the two facts above, what can cause cancer by producing mutations in DNA?

Select from the following. 1). A drug.; 2). Pesticides; 3). cigarettes; 4). A computer; 5). Toxicity; 6). jet fuel; 7). copper; 8). PDAs;
Answer:
6).