Which of the following is NOT a correct description of cnidarian nervous tissues?

A)Hydrozoan medusae have ring nerves
B)Scyphozoan medusae have marginal sense organs
C)The nerve net synapses with both the nematocysts and the epitheliomuscular cells
D)Scyphozoa have both a fast conducting and a slow conducting system to coordinate movements
E)Cnidaria are the first animals to develop a central nervous system