A nurse is caring for a client who has chronic glomerulonephritis. The nurse should expect to find a decrease in which of the following serum laboratory values?

A. Phosphate levels typically increase in chronic kidney disease due to impaired excretion. B. Hemoglobin level decreases because the damaged kidneys produce less erythropoietin, leading to anemia. C. Creatinine levels increase as renal function declines. D. Potassium tends to increase due to reduced excretion by the kidneys.