On the Patient's Return to the Medical-Surgical Unit, the Nurse

On the patient's return to the medical-surgical unit, the nurse performs an abdominal assessment. To assess bowel sounds, the nurse auscultates the lower abdomen for

A) 1 minute.
B) 5 to 20 seconds.
C) as long as it takes to hear a bowel sound.
D) one full inspiration and expiration.