This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
Buerger's disease is caused by: 
Select and explain. 
A. Asbestosis, B. Alcohol, C. Cigarette smoking, D. Drug abuse
C: Cigarette smoking
Answer: C: Cigarette smoking 
Explanation: Buerger's disease is caused by vasculitis of vessels of the hands and feet. This disorder is highest among males aged 20 to 40, who have a history of smoking or chewing tobacco.