Which of the Following Statements Is True for Sipunculans but Not

Which of the following statements is true for sipunculans but not for members of the Chaetopteridae? Check all that apply.

A) These worms are not metameric.
B) These worms are phylogenetic enigmas whose taxonomic status is being reconsidered.
C) These worms have been considered in older taxonomies to comprise a phylum separate from Annelida.
D) These worms are bioluminescent.Bioluminescence may help deter predators.
E) External fertilization and development results in the development of trochophore larvae.
F) Feeding involves the use of tentacles surrounding the mouth.