Which of the following is true of phylum Cnidaria?
A-Phylum Cnidaria contains animals with medusa and polyp body forms.
B- Phylum cnidaria contains the world's simplest animals, sponges.
C-Phylum Cnidaria contains animals with no tissue and no body symmetry.
D-Phylum Cnidaria contains the placozoan animal T. adhaerens.