In Reference to Fish Respiration

In reference to fish respiration,

A) gills are thick lobes of tissue with little blood supply.
B) gills are used to rid the body of nitrogenous wastes similar to the kidneys in humans.
C) about 80-90% of dissolved oxygen in the water is absorbed by the skin.
D) blood flows through the gills in the same direction that water flows over them.
E) gases are exchanged between the lamellae of the gills and the water.