Unlike Most Bony Fishes, Sharks Maintain Body Fluids That Are

Unlike most bony fishes, sharks maintain body fluids that are isoosmotic to sea water. They are therefore considered by many to be osmoconformers because of the unusual way they maintain homeostasis. They osmoregulate by

A) using their gills and kidneys to rid themselves of sea salts.
B) monitoring dehydration at the cellular level with special gated aquaporins.
C) tolerating high urea concentrations that balance internal salt concentrations to sea water osmolarity.
D) synthesizing trimethylamine oxide, a chemical that speeds salt removal from cells.
E) possessing a special adaptation that allows their cells to operate at an unusually high salt concentration.