The Nurse Is Administering a Metered-Dose Inhaler to a Patient

The nurse is administering a metered-dose inhaler to a patient using a spacer.The nurse instructs the patient to exhale completely and then depresses the medication chamber.How long does the nurse instruct the patient to inhale deeply and slowly through the mouth before holding the breath for 10 seconds?

A) 3 to 5 seconds
B) 10 to 15 seconds
C) 15 to 20 seconds
D) 25 to 30 seconds