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?

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

Increase breathing rate for a full 30 seconds.

Raise hands above the head to expand the diaphragm.

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