With the Exception of Cnidarians and Nematodes, Eumetazoans Can Be

With the exception of cnidarians and nematodes, eumetazoans can be divided into the two groups: protostomes and deuterostomes. A feature NOT used to separate these groups is the

A) fate of the blastopore in embryo development.
B) way the coelom forms in the embryo.
C) way the embryonic cells divide.
D) number of germ cell tissues.
E) the way the mesoderm slits.