The Nurse Is Auscultating a Patient's Lungs but Is Unable

The nurse is auscultating a patient's lungs but is unable to hear much air movement. What is the nurse's next step in the attempt to most effectively hear the lung sounds?

A) Try another stethoscope.
B) Have the patient assume a side-lying position.
C) Ask the patient to breathe deeply through the mouth.
D) Have the patient rest between breaths.