While administering a blood transfusion, the client receiving the blood postoperatively displays manifestations of dyspnea, dry cough, and pulmonary edema. What is the priority action for the nurse to take?

Stop the transfusion immediately, obtain a culture of the client's blood, and administer antibiotics immediately.

Stop the transfusion immediately, notify the health care provider, monitor vital signs, and administer acetaminophen.

Stop the transfusion immediately, notify the health care provider immediately, and administer Lasix.

Stop the transfusion immediately, monitor vital signs, notify the health care provider, and place the client in an upright position with their feet dependent.