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
[{'content': "Which of the following features is shared in common between lymphocyte - rich and lymphocyte predominant types of Hodgkin's lymphoma - \nSelect and explain. \nA. Paucity of diagnostic RS cells, B. EBV is associated, C. RS cells are CD 20 positive, D. Good prognosis", 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]