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
Which of the following are risk factors for Angiosarcoma 
Select and explain. 
A. Polyvinylchloride, B. Arsenic, C. Thorotrast, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: Option A, B, C are all risk factors for Angiosarcoma.