A nurse practitioner is seeing a client in the clinic and suspects that the client has Cushing Syndrome. The NP might order which of the following tests to aid him/her in making their diagnosis:

a. Abdominal ultrasound, 24 hour urine for total protein and cortisol clearance
b. A 24 hour urine for total protein and creatinine clearance, CBC with WBC differential and a serum cortisol
c. Blood chemistries for sodium, potassium, and glucose, CBC with WBC differential, 24-hour free cortisol test
d. CT scan and/or MRI and a CBC with WBC differential