At 10:00 AM,the Nurse Receives 2 Units of Blood for a Patient

At 10:00 AM,the nurse receives 2 units of blood for a patient to be transfused.The nurse should:

A) Set up 1 unit for the infusion to start at 10:30 AM, and send the other unit back until the first one has run.
B) Set up both units to run at the same time for an infusion at 11:00 AM.
C) Set up one unit for infusion, and place the other in the refrigerator for the later infusion.
D) Send both units back and ask for a reissue of 1 unit only.