A nurse is collecting data from a hospital patient who has been admitted with pyelonephritis. He is acutely ill with a high fever, chills, nausea, and vomiting. He also has severe pain in the flank area. What is the primary goal of treatment.

Provide adequate nutrition with a stable body weight.

Give pain relief with analgesics and antispasmodics.

Prevent further damage to his kidneys that could lead to renal failure.

Provide adequate hydration with pulse and blood pressure within patient norms.