When a Patient Has a Suspected Vestibular Disorder,the Physician Orders

When a patient has a suspected vestibular disorder,the physician orders an electronystagmography test.The nursing instruction for this test will include:

A) Use of tea or coffee on the morning of test
B) Electrodes placed on the scalp
C) Air blown into the external ear
D) Nothing to eat or drink (NPO) 3 hours before the test