As a Part of Preoperative Teaching,the Nurse Is Instructing Mr

As a part of preoperative teaching,the nurse is instructing Mr.Zuk on the use of a volume-oriented incentive spirometer.Which instruction should be included in this teaching?

A) Tilt the device slightly toward yourself while using
B) Take a deep breath and cough several times before using the incentive spirometer
C) Inhale a slow,deep breath to elevate the ball in the cylinder and hold for 2 seconds
D) Blow out into the mouthpiece until the ball in the cylinder rises and hold it for 2 seconds