A client with anemia secondary to chronic kidney disease (CKD) started a prescription for epoetin alfa two months ago. Which client finding best indicates that the medication is effective? Reference Range: Hemoglobin (Hgb) [14 to 18 g/dL (8.7 to 11.2 mmol/L)]

A) Takes concurrent iron therapy without adverse effects: While taking concurrent iron therapy without adverse effects is beneficial, it does not directly indicate the effectiveness of epoetin alfa. Epoetin alfa stimulates erythropoiesis, and its effectiveness is best measured by improvements in hemoglobin levels, not just the tolerance of iron supplementation. B) Reports of increased energy levels and decreased fatigue: Reports of increased energy levels and decreased fatigue are positive signs but are subjective and not specific indicators of epoetin alfa's effectiveness. The most reliable measure of the medication's impact is the objective increase in hemoglobin levels. C) Hemoglobin level increased to 12 g/dL (7.45 mmol/L): An increase in hemoglobin level to 12 g/dL is a direct and objective indicator that epoetin alfa is effective. This medication is designed to raise hemoglobin levels, so seeing a rise to within the reference range signifies that the treatment is working as intended. D) Food diary shows increased consumption of iron-rich foods: Increased consumption of iron-rich foods is beneficial for supporting erythropoiesis but does not directly measure the effectiveness of epoetin alfa. The primary measure of the medication's success is the increase in hemoglobin levels, rather than dietary changes alone