Marine Fish Must Use Energy to Maintain Their Body Fluid

Multiple Choice

Marine fish must use energy to maintain their body fluid balance,because

A) they live in a hypertonic environment and need to use energy to retain water.
B) they must get rid of the excess water that constantly moves into their interstitial fluid.
C) they must actively take up solutes from their surroundings.
D) their kidneys must reabsorb solutes from the external surroundings.