The nurse is administering sodium polystyrene sulfonate to a client in acute kidney injury (AKI). Which laboratory finding indicates that the medication has been effective?

B Serum glucose level of 120 mg/dL (6.7 mmol/L). C Serum potassium level of 3.8 mEq/L (3.8 mmol/L). A Hemoglobin level of 13.5 g/dL (135 g/L). D Serum ammonia level of 30 mg/dL (17.62 ┬Ámol/L).