The primary means by which a neuron can communicate to a second neuron is by

A)the frequency of its action potentials.
B)the peak of the depolarization phase of an action potential.
C)the peak of the undershoot/hyperpolarization of an action potential.
D)varying how much neurotransmitter it releases for a given action potential.
E)remaining in the depolarization phase of the action potential for an extended interval.