What Intervention Is Most Appropriate to Prevent Respiratory Complications Resulting

What intervention is most appropriate to prevent respiratory complications resulting from immobility?

A) Suction every 4 to 6 hours.
B) Administer pain medications as frequently as possible.
C) Teach the patient the technique of pursed lip breathing.
D) Reposition the patient, and encourage him or her to cough and deep breathe at least every 2 hours.