You are presented with the question "what cause production of mutations in DNA of areas such as lungs" and the following answer choices: 
- Damages them
 - the environment
 - carcinogens
 - cigarettes
 - rays or beams
 - smoking tobacco
 - smoking
 - Pollution

Now knowing that most carcinogens cause cancer by producing mutations in DNA and lung cancer is the deadliest of all cancers, choose the best answer.


 

   carcinogens      