How Do Marine Polychaetes Use Chitin-Hardened Body Parts

How do marine polychaetes use chitin-hardened body parts?

A) as chitin-reinforced bristles for movement only
B) as chitin-hardened tentacles to move sand only
C) as chitin-hardened jaws to capture prey only
D) as chitin-hardened jaws to capture prey and chitin-hardened tentacles to move sand
E) as chitin-reinforced bristles for movement and chitin-hardened jaws to capture prey