A Marine Invertebrate Placed into Freshwater Would Have Difficulty Surviving

A marine invertebrate placed into freshwater would have difficulty surviving because:

A) it would not be able to obtain food.
B) it would have difficulty with buoyancy.
C) it would have difficulty with osmoregulation.
D) it would not experience the temperature stability found in the oceans.
E) it would not be able to obtain oxygen due to the absence of waves in the water.