The nurse is administering 0.45% NaCl (sodium chloride) intravenously to a client. What effect will this have on the client's body?

A. Increase interstitial volume: While 0.45% NaCl contributes some fluid to the extracellular space, it is a hypotonic solution. Its primary effect is not expansion of the interstitial volume but redistribution of fluid into cells. B. Fluid will move into cells: 0.45% NaCl is a hypotonic solution, meaning its osmolarity is lower than that of plasma. When administered intravenously, water moves from the extracellular space into cells via osmosis to balance solute concentrations, rehydrating intracellular compartments and potentially correcting cellular dehydration. C. Fluid will move out of cells: Fluid moves out of cells when a hypertonic solution is administered, which has a higher osmolarity than plasma. Since 0.45% NaCl is hypotonic, it draws fluid into rather than out of cells. D. Increase sodium levels: Although the solution contains sodium, it is relatively dilute. Administration of 0.45% NaCl does not significantly raise plasma sodium levels and may actually dilute extracellular sodium slightly while hydrating cells.