The correct anser is b. The South China Sea.
This sea is a marginal sea, which is considered a part of the Pacific Ocean and it has an area of about three and a half million kilometers. It is one of the most important seas in the World, not only because of its size, but also because one third of the world's shipping is sailing in these waters, and also its seabed is supposedly a rich source of unused oil and gas reserves. It is a home to a dozen of islands which are mostly uninhabited because of the disputes between the countries for the territories.
