When the Concentration of Sodium Ions in the Fluid Surrounding

When the concentration of sodium ions in the fluid surrounding cells decreases, and the concentration of other solutes remains constant, which of the following may occur?

A) The cells will not change.
B) The cells will shrink.
C) The cells will swell.
D) The fluid outside of the cells will become isotonic.
E) The fluid outside of the cells will become hypertonic.