The answer is C. This is because the mind can make the body do anything, and the body can make the brain think certain things also. So basically the mind and the body play tag with each other on this topic.
The answer to this is probably their ability to absorb heat. Oceans are great at absorbing heat from the sun and storing it. If they were bad at it, the heat would be trapped due to the greenhouse effect and the climate would become scorching hot. This way, oceans absorb large amounts of heat and effectively reduce the overall temperature of the world.
