One characteristic of class Bivalvia is that they:

A) are active swimmers
B) use a radula to feed on algae
C) possess two shells with a hinge
D) use their mantle for locomotion
E) possess shells of overlapping plates

Bivalvia

Bivalvia is a class of marine and freshwater mollusks with bodies enclosed by a two-part hinged shell, including clams, oysters, mussels, and scallops.

Two Shells

Refers to bivalves, a class of aquatic mollusks with bodies enclosed by a pair of hinged shells.