It Has Been Proposed That the Reason That the Pacific

It has been proposed that the reason that the Pacific Ocean has many more coral reefs than the Atlantic Ocean is that

A) the Atlantic Ocean is too saline for many coral species.
B) the ocean currents in the Atlantic are too swift to allow for coral reefs to develop unimpeded.
C) the last glacial advance left the Atlantic too cold to allow coral to survive.
D) there are too many large rivers discharging polluted waters into the Atlantic basin to support as many coral reefs as in the Pacific,which is much larger and more immune to the pollution.