Before inserting an otoscope in an adult client, which of the following maneuvers should the examiner perform
A. irrigate the ear canal to make sure the tympanic membrane is visible
B. have the client blow his or her nose to make sure pressure is equalized between the external ear and the middle ear.
C. pull the pinna up and back to straighten the auditory canal
D. tilt the client's head toward the side being examined