Potassium Is Said to Be at Equilibrium During a Resting

Multiple Choice

Potassium is said to be at equilibrium during a resting potential because

A) electrostatic pressure forcing it in equals the diffusion pressure forcing it out.
B) diffusion pressure forcing it in equals the electrostatic pressure forcing it out.
C) hydrostatic pressure forcing it in equals the electrostatic pressure forcing it out.
D) it is equally concentrated inside and outside the cell.