Which Characteristic of Water Contributes to the Relatively Constant Temperatures

Which characteristic of water contributes to the relatively constant temperatures of the oceans?

A) Water ionizes only slightly.
B) It takes a small amount of heat energy to raise the temperature of water.
C) Water can contain large amounts of salt.
D) Water has the ability to ionize readily.
E) It takes a large amount of heat energy to raise the temperature of water.