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
Hodgkin's lymphoma can be distinguished from non Hodgkin's lymphomas by 
Select and explain. 
A. Reed- Sternberg cells, B. Systemic manifestations, C. Occurrence in young adults, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: None