Different phases of a typical nerve fibre action potential are explained in the following statements:

A. The membrane potential is brought to the threshold potential (firing level) due to the opening of some voltage-gated sodium channels in response to a threshold depolarizing stimulus.

B. The rapid depolarization after the firing level is caused by opening of more voltage-gated sodium channels and entry of Na⁺ into the nerve fibre.

C. The reversal of membrane potential (overshoot) at the peak of action potential occurs as membrane potential moves towards the equilibrium potential of K⁺.

D. The peak voltage of action potential does not reach the equilibrium potential of K⁺ primarily because the increase of K⁺ conductance is short-lived.

Which one of the following options represents the combination of the correct statements?