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': 'Bacteria reproduce mainly by \nSelect and explain. \nA. budding, B. binary fission, C. sporing, D. bacterial components produced by host cells', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]