Mollusks Have All of the Following Except

Multiple Choice

Mollusks have all of the following except

A) visceral mass covered with a soft epithelium.
B) folds enclosing a cavity between themselves and the visceral mass.
C) gills or lungs within the mantle.
D) individuals secrete a tiny chitinous chamber,zoecium.
E) the shell consists of a horny outer layer,which is rich in protein.