This taxon is considered to be more closely related to Arthropods than to other worm phyla. Why is that?
a. Annelids have jointed appendages similar to Arthropods.
b. Platyhelminthes share a common ancestor with Arthropods.
c. Nematodes have an exoskeleton like Arthropods.
d. Mollusks have a hard exoskeleton, similar to Arthropods.
