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
In hepatocellular carcinoma, risk factor most important is 
Select and explain. 
A. Alcoholic hepatitis, B. Schistosomiasis, C. Cirrhosis, D. Fasciolepsis buski infestation
C: Cirrhosis
Answer: C: Cirrhosis 
Explanation: Cirrhosis is the most important risk factor for HCC.
"75-85% of HCC occur in patients with macronodular cirrhosis" - Harrison