A Patient with Pneumonia Has Been Using the Incentive Spirometer

A patient with pneumonia has been using the incentive spirometer four times daily while awake during his 3-day hospitalization. How would the nurse explore the effectiveness of this intervention?

A) The nurse would ask whether the patient was breathing better.
B) The nurse would add turn, cough, and deep breathing exercises.
C) The nurse would watch the patient use the incentive spirometer.
D) The nurse would auscultate the lungs for adventitious breath sounds.