A nurse is caring for a client who is in the oliguric phase of acute kidney injury. Which of the following actions should the nurse take?

A. Provide a diet high in protein is incorrect because during the oliguric phase of acute kidney injury (AKI), the kidneys cannot effectively excrete nitrogenous waste. A high-protein diet can worsen azotemia and increase the risk of uremia. Protein intake is usually limited until renal function improves. B. Encourage the client to consume at least 2 L of fluid daily is incorrect because clients in the oliguric phase have severely reduced urine output (<400 mL/day). Excess fluid intake can lead to fluid overload, pulmonary edema, and hypertension. Fluid intake is usually restricted based on output plus insensible losses. C. Monitor intake and output is correct because accurately tracking fluid balance is critical in the oliguric phase. This helps detect fluid retention, guide fluid restriction, and prevent complications such as edema, pulmonary congestion, and worsening kidney injury. D. Provide ibuprofen is incorrect because nonsteroidal anti-inflammatory drugs (NSAIDs) like ibuprofen are nephrotoxic and can further impair kidney function, worsening AKI.