The nurse is caring for a client with fluid volume excess. Which dietary change will be most effective in addressing the fluid volume excess?

The correct answer is B: Decrease sodium intake. Sodium is a major contributor to fluid retention as it causes the body to retain water. By decreasing sodium intake, the client will excrete more water, thus reducing fluid volume excess. Increasing protein intake (A) does not directly affect fluid volume. Increasing carbohydrate intake (C) and decreasing fat intake (D) do not address the underlying issue of fluid retention. It is essential to focus on reducing sodium intake to effectively manage fluid volume excess.