The nurse manager investigates and determines that five vials of morphine sulfate were removed from the automatic drug dispenser using the nurse practitioner's login identification, but no clients had prescriptions for morphine on this shift. Which approach should the nurse manager use to confront the nurse practitioner?
1) Confront the nurse practitioner privately and ask for an explanation
2) Report the incident to the hospital administration
3) Conduct a formal investigation with the involvement of the hospital's security team
4) Seek guidance from the hospital's legal department
