You are presented with the question "the godzilla of cancers is most often caused by exposure to what?" and the following answer choices: 
- rays or beams
 - fossil fuels
 - Pollution
 - tobacco smoke
 - light energy
 - Chemical energy
 - high temperature
 - harmful substances

Now knowing that lung cancer is most often caused by exposure to tobacco smoke and lung cancer is the Godzilla of cancers, choose the best answer.


 

    tobacco smoke     