The Nurse Observes a Client Using the Incentive Spirometer and S

The nurse observes a client using the incentive spirometer and s that further instruction is required when the client performs which action?

A) Exhales before placing the incentive spirometer to the lips
B) Seals the lips tightly around the mouthpiece of the incentive spirometer
C) Inhales quickly,causing the spirometer balls to snap to the top of the incentive spirometer
D) Attempts to cough productively after using the incentive spirometer