You are presented with the question "What can be caused by direct or passive inhalation?" and the following answer choices: 
- skin grafts
 - prolonged thirst
 - science
 - Toxicity
 - lung cancer
 - negative
 - friction
 - craters

Now knowing that lung cancer is most often caused by exposure to tobacco smoke and smoke Tobacco smoke , whether directly or passively inhaled, has been shown to worsen asthma, choose the best answer.


 

     lung cancer    