When Teaching the Patient About Positive Expiratory Pressure Therapy (PEP)and

When teaching the patient about positive expiratory pressure therapy (PEP) and "huff" coughing,the nurse incorporates which of the following in the plan of care?

A) Instruct the patient to remain flat in bed.
B) Place a nose clip on the patient's nose.
C) Instruct the patient to breathe through his nose.
D) Instruct the patient to exhale with long slow breaths.