The charge nurse observes a practical nurse (PN) measuring the waist circumference of a client who has expressed a concern about health problems related to obesity. Which action should the nurse implement?

Advise the PN that waist circumference measurements are valuable to assess fluid retention but not obesity.

Instruct the PN to measure the client's waist circumference every 8 hours to assess for changes.

Tell the PN that this assessment technique should be performed by the nurse.

Review the measurement obtained by the PN and compare with ideal measurements for this client.