A nurse is preparing to administer total parenteral nutrition to a client. Which of the following actions should the nurse take?

The correct answer is C: Keep the solution refrigerated until 1 hr before infusion. This is important to prevent bacterial growth in the TPN solution. Refrigerating it helps maintain its sterility and integrity. Changing the solution every 36 hr (A) is not necessary unless contamination is suspected. Obtaining the client's weight three times a week (B) is important for monitoring fluid status but not specifically related to TPN administration. Checking the client's WBC count daily (D) is not directly related to TPN administration.