In Animals, Which of the Following Situations Indicates That Osmoregulation

In animals, which of the following situations indicates that osmoregulation is occurring?

A) The intracellular fluid has the same osmotic concentration as the extracellular fluid.
B) The extracellular fluid has the same osmotic concentration as the environment.
C) The osmotic concentration of the extracellular fluid is greater than that of the environment.
D) The osmotic concentration of the concentration of intracellular fluid is less than that of the extracellular fluid.
E) The osmotic concentration of the intracellular fluid is greater than that of the extracellular fluid.