Which of the Following Statements About Osmoconformers Is FALSE

Which of the following statements about osmoconformers is FALSE?

A) They do not have to adapt to the solute concentrations in the external environment.
B) Their internal osmotic pressure matches that of the surrounding environment.
C) They often actively regulate the concentrations of particular ions in their body fluids.
D) They use less energy to regulate osmotic pressure than osmoregulators.
E) Most marine invertebrates are osmoconformers.