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: Pathology
Smoking is most strongly associated with which type of lung cancer? 
Select and explain. 
A. Small cell cancer, B. Squamous cell carcinoma, C. Adenocarcinoma, D. Carcinoid tumor
A: Small cell cancer
Answer: A: Small cell cancer 
Explanation: None