A Sponge Actually Feeds by

A sponge actually feeds by

A) acting as a net in a current that sweeps food particles through it.
B) squeezing the spongocoel cavity and sucking debris in and out through the osculum.
C) the beating of the flagella of collar cells,forming a current; food is absorbed 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.
E) water the moves gently through the sponge and the amoebocytes that engulf passing food.