Fact 1: Most carcinogens cause cancer by producing mutations in DNA.

Fact 2: Asbestos is a known carcinogen.

Given the two facts above, answer the question "what causes cancer by producing mutations in DNA?" with the following options: 
- bacteria
 - h2o
 - Pesticides
 - cigarettes
 - asbestos
 - A computer
 - digestion
 - Toxicity


 

     asbestos    