When assessing a client who is 4 hours postoperative following an open appendectomy, which of the following manifestations should indicate to the nurse that the client requires a nasogastric tube with low intermittent suction?

A) Absence of bowel sounds and flatus
B) Clear breath sounds and adequate oxygen saturation
C) Presence of bowel sounds and passage of flatus
D) Complaints of incisional pain and discomfort