This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Oncology, Subject name: Surgery
Kaposi sarcoma is caused by: 
Select and explain. 
A. HHV 17, B. HHV 8, C. HPV 16, D. Human simian virus 40
B: HHV 8
Answer: B: HHV 8 
Explanation: Kaposi sarcoma is caused by HHV 8.