Fifteen Minutes After a Transfusion of Packed Red Cells Is

Fifteen minutes after a transfusion of packed red cells is started, a patient develops tachycardia and tachypnea and complains of back pain and feeling warm. The nurse first action should be to

A) disconnect the transfusion and infuse normal saline.
B) obtain a urine specimen to send to the laboratory.
C) administer oxygen therapy at a high flow rate.
D) notify the health care provider about the transfusion reaction.