At the Muscle End Plate, Acetylcholine (ACh) Causes the Opening $\mathrm{Na}^{+}$

At the muscle end plate, acetylcholine (ACh) causes the opening of

A) $\mathrm{Na}^{+}$ channels and depolarization toward the $\mathrm{Na}^{+}$ equilibrium potential
B) $\mathrm{K}^{+}$ channels and depolarization toward the $\mathrm{K}^{+}$ equilibrium potential
C) $\mathrm{Ca}^{2+}$ channels and depolarization toward the $\mathrm{Ca}^{2+}$ equilibrium potential
D) $\mathrm{Na}^{+}$ and $\mathrm{K}^{+}$ channels and depolarization to a value halfway between the $\mathrm{Na}^{+}$ and $\mathrm{K}^{+}$ equilibrium potentials
E) $\mathrm{Na}^{+}$ and $\mathrm{K}^{+}$ channels and hyperpolarization to a value halfway between the $\mathrm{Na}^{+}$ and $\mathrm{K}^{+}$ equilibrium potentials