Peeper Frogs Freeze During the Winter

Peeper frogs freeze during the winter. As they begin to freeze, their livers break down glycogen and release glucose into the blood, which can then be taken up into cells. This provides a benefit to the frog in that

A) plasma glucose acts as a cryoprotectant by lowering the freezing point of the extracellular fluid.
B) cellular glucose acts as a cryoprotectant by lowering the freezing point of the intracellular fluid.
C) cellular glucose is readily available for glycolysis once the frog thaws.
D) all of these.
E) none of these.