Which of the Following List of Features Describes the Molluscs

Which of the following list of features describes the molluscs and bivalves but not the annelids?

A) Reduced cephalization,contain a muscular foot and a mantle,may possess a hard outer shell.
B) Presence of cephalization,contain a muscular foot and a mantle,may possess a hard outer shell and have a complete digestive system.
C) Lack of cephalization,contains circular muscles that enable them to move,may possess a hard outer shell,and have a complete digestive system.
D) Lack of cephalization,every member of the group will have a hard outer shell as well as a complete digestive system.
E) None of these lists describes the molluscs and bivalves but not the annelids.