Increasing the Concentration of Sodium Ions on the Outside of the Membrane

Increasing the concentration of sodium ions on the outside of the membrane (for example, increasing sodium outside from 130 to 200 mM)

A) does not change the sodium ion equilibrium potential.
B) makes the sodium ion equilibrium potential more negative.
C) makes the sodium ion equilibrium potential more positive.
D) changes the mean open time of sodium channels.
E) changes the electrostatic charges within the pore of the channel.