The correct option is D All of the above
Caspian Sea - It is the world’s largest inland body of water. It lies to the east of the Caucasus Mountains and to the west of the vast steppe of Central Asia. The sea’s name derives from the ancient Kaspi peoples, who once lived in Transcaucasia to the west. The sea is bordered in the northeast by Kazakhstan, in the southeast by Turkmenistan, in the south by Iran, in the southwest by Azerbaijan, and in the northwest by Russia. The major rivers-the Volga, Ural, and Terek-empty into the northern Caspian, with their combined annual flow accounting for about 88 percent of all river water entering the sea. The Caspian Sea has been famous for its sturgeon, a fish prized for its caviar, and the sea accounts for the great bulk of the world catch. Petroleum and natural gas have become the region’s most important resources.