A nurse is caring for a child who has increasing manifestations of fever, headache, stiff neck, and rash. Which of the following diagnostic tests should the nurse expect the health care provider to order?

A. Glasgow Coma Scale (GCS) assessment is used to assess the level of consciousness in patients with head trauma or neurological conditions, but it is not the diagnostic test for suspected meningitis. B. Cerebrospinal fluid (CSF) analysis is the definitive test for diagnosing meningitis. A lumbar puncture is performed to obtain a sample of CSF, which is then analyzed for signs of infection, such as increased white blood cells, proteins, and low glucose levels. C. RBC count is useful for assessing anemia and other hematological conditions, but it is not specific to diagnosing meningitis. D. Magnetic resonance imaging (MRI) can be used to assess brain structure, but CSF analysis remains the primary diagnostic tool for confirming meningitis based on the clinical signs of fever, headache, stiff neck, and rash.