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
A 4 year-old girl with a history of hydrocephalus is brought to the neurologist by her parents with a severe headache and fever. The girl underwent a surgery for a ventricular-peritoneal shunt 2 months ago, and the neurologist suspects that an infection has occurred. Organisms would most likely be isolated from the shunt tubing is: 
Select and explain. 
A. Staph aureus, B. Streptococcus, C. Staphylococcus epidermidis, D. Meningococcus
C: Staphylococcus epidermidis
Answer: C: Staphylococcus epidermidis 
Explanation: Staphylococcus epidermidis