Most carcinogens cause cancer by producing mutations in DNA, and lung cancer is the deadliest of all cancers. Given these facts, what cause production of mutations in DNA of areas such as lungs among the following options:
- Damages them
 - the environment
 - carcinogens
 - cigarettes
 - rays or beams
 - smoking tobacco
 - smoking
 - Pollution


 

   carcinogens      