Which of the following explains how aquatic animals in the Arctic and Antarctic survive at subzero temperatures? A. Ice has a higher density than water, allowing it to float on top.

B. Water freezes from bottom upward, forming an insulating layer of ice at the bottom.

C. Water expands on cooling below 4 °C, increasing in volume until it reaches 0 °C

D. The low specific heat of water lets it cool down slowly, allowing aquatic animals to survive.