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
Acute osteomyelitis is most frequently caused by which of the following microorganisms? 
Select and explain. 
A. Gonococcus, B. Enterococcus, C. Streptococcus, D. Staphylococcus
D: Staphylococcus
Answer: D: Staphylococcus 
Explanation: None