Which of the Following List of Features Describes the Molluscs

Multiple Choice

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.