The nurse is caring for a client with emphysema who is mildly dyspneic after ambulation. Which instruction should the nurse provide to the client to improve gas exchange?

Lay down on each side with knees bent and breathe from abdomen.

Raise hands above the head to expand the diaphragm.

Increase breathing rate for a full 30 seconds.

Draw air in through nose and exhale slowly through pursed lips.