In the Green Glands of Freshwater Crustaceans, a Coelomic End

In the green glands of freshwater crustaceans, a coelomic end sac forms urine by filtration of fluid (haemolymph) from the circulatory system. The filtrate passes through a ciliated funnel and down a coiled tubule, the nephridial canal, where solutes are reabsorbed so that the urine voided to the exterior is more dilute than the body fluids. In structure and function, the green glands of freshwater crustaceans are most like the

A) protonephridia of rotifers.
B) coxal glands of spiders.
C) metanephridia of earthworms.
D) nephrons of freshwater fishes.
E) the rectal pads of blow flies.