Which of the following facts about the ocean water indicates that the ocean is a major resource of nutrients? A.
Nearly a third of the world's known oil resources are found underneath the ocean floor.

B.
100 mL of ocean water contains millions of bacteria and hundreds of thousands of phytoplankton.

C.
The oceans cover almost three-fourths of the world's surface.

D.
Ocean water becomes denser as its salinity increases or its temperature decreases.