After a thoracotomy, the nurse instructs the client to perform deep-breathing exercises. Which of the following is an expected outcome of these exercises?

D Deep breathing expands the alveoli and increases the lung surface available for ventilation. A Deep breathing elevates the diaphragm, which enlarges the thorax and increases the lung surface available for gas exchange. C Deep breathing controls the rate of air flow to the remaining lobe so that it will not become hyperinflated. B Deep breathing increases blood flow to the lungs to allow them to recover from the trauma of surgery.