Which of these sentences gives the cause of the other sentences from "Mysterious Oceans"?

A.
The animals have to be able to live without light, heat, or very much food.

B.
The bottom of the sea is cold, dark, and doesn't have much food.

C.
The starfish of the deep sea are usually bigger and worker harder for food than shallow water starfish.

D.
Anglerfish of the deep sea have a light on their heads which attracts prey.