A nurse is preparing to administer a unit of packed red blood cells (PRBCs) to a client who has anemia. Which is the priority action?

Verify the client's identification and blood compatibility with assistive personnel (AP).

Teach the client about signs and symptoms of a transfusion reaction.

Obtain the client's temperature, heart rate, and blood pressure 15 minutes before starting the infusion.

Prime the blood administration tubing with 0.45% sodium chloride.