A nurse is reviewing a client's laboratory values. Which of the following should the nurse review to evaluate the client's nutritional status?

A. Serum albumin reflects the client’s protein stores and overall nutritional status. Low levels indicate malnutrition, chronic illness, or liver disease. B. Erythrocyte sedimentation rate (ESR) indicates inflammation, not nutrition. C. Troponin is a cardiac biomarker for myocardial injury, unrelated to nutrition. D. Serum sodium evaluates fluid balance and electrolyte status, not nutritional state.