A nurse is preparing to instill an enteral feeding to a client who has an NG tube in place. What is the nurse's highest assessment priority before performing this procedure?

The correct answer is B: Verify the placement of the NG tube. This is the highest assessment priority before instilling enteral feeding to prevent complications like aspiration. The nurse must ensure the NG tube is correctly positioned in the stomach to avoid feeding into the lungs. Checking the length of time the feeding container has been open (A) is important but not as critical as verifying tube placement. Confirming the client doesn't have diarrhea (C) is important for monitoring overall health but not directly related to the procedure. Ensuring the client is alert and oriented (D) is essential but not the priority for this specific procedure.