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: Microbiology
[{'content': 'Virus are sharply differentiated from bacteria by: \nSelect and explain. \nA. Presence of either DNA or RNA, B. Simple structure, C. Complex multiplication, D. All', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]