Which of the following is a direct result of depolarizing the presynaptic membrane of an axon terminal?

A)Voltage-gated calcium channels in the membrane open.
B)Synaptic vesicles fuse with the membrane.
C)The postsynaptic cell produces an action potential.
D)Ligand-gated channels open, allowing neurotransmitters to enter the synaptic cleft.
E)An EPSP or IPSP is generated in the postsynaptic cell.