A nurse is planning care for a client who has urolithiasis. Which of the following actions should the nurse take?

A. Apply cold compress to the client's flank area: Cold compresses are generally more useful for reducing inflammation and pain related to trauma. However, in urolithiasis, applying heat is preferred to relax smooth muscles in the urinary tract and relieve spasms associated with renal colic. B. Restrict protein intake to 2 servings per day: Although reducing this may help prevent certain types of stones (like uric acid stones), a strict restriction to two servings daily may not be necessary for all patients and should be individualized. Protein restriction alone is not the primary management focus in acute care. C. Encourage intake of at least 3 L of fluids per day: High fluid intake helps dilute urine and promotes the passage of stones by increasing urinary output. It also prevents new stone formation by reducing urinary concentration of stone-forming substances. This is a cornerstone of both treatment and prevention for urolithiasis. D. Discourage ambulation: Ambulation is actually encouraged in clients with urolithiasis as movement can help promote the passage of stones through the urinary tract. Discouraging ambulation can increase discomfort and delay stone expulsion.