Which Situation in the High-Risk Antepartal Unit Requires Immediate Intervention

Which situation in the high-risk antepartal unit requires immediate intervention?

A) Fetal monitoring is being performed on a client in her third trimester who is scheduled for a cholecystectomy tomorrow.
B) A third-trimester client pregnant with twins who required an appendectomy yesterday is positioned in a supine position.
C) Oxygen is being administered at 2 L via nasal cannula to a client in her third trimester who underwent a urolithotomy today.
D) The client in her third trimester who returned from bowel resection surgery has a nasogastric tube attached to intermittent suction.