Sponges Feed Differently Than Comb Jellies Because a Sponge Feeds

Sponges feed differently than comb jellies because a sponge feeds by

A) acting as a net in a current that sweeps food particles into its central cavity and digests them externally.
B) squeezing the spongocoel cavity and sucking debris in and out through the osculum.
C) the beating of collar cells' flagellae,which form a current; the current brings food particles which are engulfed and digested by collar cells.
D) the beating collar cells form a current from osculum to pores; the food is engulfed by amoebocytes in the central cavity of the sponge.