A nurse is caring for a client who has increased intracranial pressure. Which of the following interventions should the nurse take?

A. A brightly lit environment can increase discomfort and potentially worsen the client's condition. B. Encouraging a minimum intake of 2000 mL of fluids may exacerbate cerebral edema. Fluid intake should be carefully monitored. C. Elevating the head of the bed 30 to 45 degrees helps reduce intracranial pressure by promoting venous drainage. D. Controlled coughing and deep breathing may increase intrathoracic pressure, which could worsen intracranial pressure.