You are presented with the question "What cause mutations in DNA?" and the following answer choices: 
- Pesticides
 - smoking
 - chromosomes
 - protein
 - cigarettes
 - mutagens
 - amino acids
 - animals

Now knowing that most carcinogens cause cancer by producing mutations in DNA and if it causes changes in DNA, it is considered a mutagen, or potential carcinogen, choose the best answer.


 

      mutagens   