A nurse is preparing to administer medications to four clients. The nurse should administer medications to which of the following clients first?

D A client who has anemia, hemoglobin of 11 g/dL, and is prescribed epoetin alfa B A client who has pneumonia, a WBC count of 11,500/mm^3, and is prescribed piperacillin C A client who has renal failure, a serum potassium of 5.8 mEq/L, and is prescribed sodium polystyrene sulfonate A A client who is post-coronary artery bypass graft (CABG), has total cholesterol of 318 mg/dL, and is prescribed atorvastatin