The Physician Orders Transfusion with Packed RBCs for a Patient

The physician orders transfusion with packed RBCs for a patient who has severe anemia resulting from a bleeding peptic ulcer.What is the most important nursing action to prevent a transfusion reaction when administering the blood?

A) Verify and document patient identification.
B) Keep the blood chilled during administration.
C) Administer the blood at a rate of no more than 2 mL/min.
D) Stay with the patient during the first 15 minutes of the transfusion.