Which Statement Concerning Cleavage Is False

Which statement concerning cleavage is false?

A) Incomplete cleavage is thought to be the ancestral condition for animal embryos.
B) Lophotrochozoans with spiral cleavage are sometimes known as spiralians.
C) Reptiles are characterized by incomplete cleavage.
D) The idiosyncratic cleavage pattern of most ecdysozoans is neither radial nor spiral.
E) Cleavage patterns can be useful for characterizing major animal groups.