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: Medicine
Poor prognostic factor of non Hodgkin's lymphoma is - 
Select and explain. 
A. Age > 60 years, B. Weight loss > 10%, C. Night sweats with loss of weight, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: None