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': 'Zero growth rate is observed during one of the phases of the bacterial growth curve: \nSelect and explain. \nA. Lag, B. Exponential growth, C. Stationary phase, D. Decline', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]