The Physician Has Ordered Cortisol Level Testing for a Patient

The physician has ordered cortisol level testing for a patient.When planning the test,what information should be provided to the patient?

A) The patient will need to be NPO for 6 hours before the procedure.
B) Increases in activity levels during the testing period will increase the reliability of results.
C) Blood samples will be collected periodically during both the day and night.
D) Sodium intake should be limited during the day before the test.