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': 'The single most important laboratory test for determining the virulence of staphylococci is \nSelect and explain. \nA. Mannitol fermentation, B. Hemolysis of sheep erythrocytes, C. Detection of coagulase, D. The catalase test', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]