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

Increasing the concentration of potassium ions on the outside of the membrane (for example, increasing potassium outside from 3 to 20 mM)

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