A client is recovering from an episode of urinary tract calculi. During discharge teaching, the client asks about dietary restrictions. In discussing fluid intake, the nurse should include which type of fluid limitation?

Choice A rationale: Citrus juices like orange or lemonade are often encouraged because they contain citrate. Citrate binds with calcium in the urine, which helps prevent the formation of calcium-based kidney stones. Choice B rationale: Tea and hot chocolate are high in oxalates. Most kidney stones are composed of calcium oxalate; therefore, limiting high-oxalate foods and beverages is a standard dietary intervention to prevent recurrence. Choice C rationale: Increasing overall fluid intake is the most important intervention for preventing stones. Clients should aim for at least 2 to 3 liters daily to keep urine dilute and flush out minerals. Choice D rationale: Low-sodium soups are generally recommended. High sodium intake increases calcium excretion into the urine, which promotes stone formation; therefore, a low-sodium diet is a protective measure, not a restriction.