Answer:
C.) Organisms which are able to survive in the deepest depths of the ocean must have adaptations that allow them to live in cold dark environments under a lot of pressure.
Explanation:
Organisms which live in the deepest depths of the ocean receive little sunlight, so they must adapt to live in those cold conditions with a lot of pressure constantly on them. Basically, if a creature lives in a certain part of the ocean, they are most likely adapted enough to live in the conditions that their home has for them.