The Nurse Who Is Preparing to Give a Feeding Per

The nurse who is preparing to give a feeding per a nasogastric (NG) tube tests the placement of the tube most safely by:

A) checking the lungs for rhonchi.
B) instilling 10 mL of sterile water and checking for cough.
C) aspirating stomach contents.
D) injecting 20 mL of air and listen at the tip of the xiphoid.