The Unique Feature(s)of a Cnidarian Nervous System Is/are

The unique feature(s) of a cnidarian nervous system is/are

A) vesicles with neurotransmitters located on both sides of the synapse.
B) nerve impulses are transmitted in both directions across a network of nerves.
C) cnidarian nerves lack any myelin surrounding the axons.
D) All of the choices are correct
E) None of the choices are correct