When a Neuron Changes Its Ion Permeability from the Resting

When a neuron changes its ion permeability from the resting state,

A) a variety of gated ion channels may open or close.
B) Na⁺ channels may open, allowing Na⁺ to enter the cell.
C) K⁺ channels must open, allowing K⁺ to enter the cell.
D) only a variety of gated ion channels may open or close and Na⁺ channels may open, allowing Na⁺ to enter the cell.
E) a variety of gated ion channels may open or close, Na⁺ channels may open, allowing Na⁺ to enter the cell, and K⁺ channels must open, allowing K⁺ to enter the cell.