The Nurse Is Assessing a Client with a History of Heart

The nurse is assessing a client with a history of heart failure who is receiving a unit of packed red blood cells.The client's respiratory rate is 33 breaths/min and blood pressure is 140/90 mm Hg.Which action does the nurse take first?

A) Administer prescribed diphenhydramine (Benadryl) .
B) Continue to monitor the client's vital signs.
C) Stop the infusion of packed red blood cells.
D) Slow the infusion rate of the transfusion.