From the point of view of commerce, the busiest ocean in the world is ______.

Correct option is D

Atlantic Ocean is the busiest ocean in terms of commerce as it has many ports on its coastline actively involved in trade and business.
 The Atlantic Ocean lies between North and South America on the west and Europe and Africa on the east. Up north, the Atlantic connects to the Arctic Ocean and to the Southern Ocean to the south. Scientists often divide the Atlantic into two basins: the North Atlantic and the South Atlantic.