The Most Accurate Explanation of the Management of Nitrogenous Wastes

The most accurate explanation of the management of nitrogenous wastes and ion balance in the crayfish is

A) the nitrogenous waste of crustaceans is excreted by the green glands and ion diffusion takes place by diffusion across thin areas of cuticle and the gills.
B) both ion balance and elimination of nitrogenous wastes is managed by the green glands.
C) hydrostatic pressure in the green glands forces fluid into the hemocoel and both ions,and nitrogenous wastes diffuse across thin areas of cuticle and the gills.
D) None of the choices is correct.
E) the nitrogenous waste of crustaceans is excreted by diffusion across thin areas of cuticle and the gills,while the so-called excretory organs regulate ion composition of the hemolymph.