I think the correct answer would be the last option. The ocean zone which has the lowest water pressure would be the uppermost zone which is the Epipelagic zone. This zone is also called as the euphotic zone or the sunlit zone. It is the region which receives the most sunlight in order to allow photosynthesis.
C is the answer hope the answer is right
I think because its the only one to be liquid at normal temperatures.
I believe the answer is B!
