The Variety of Materials Available to Sumerian Artisans Is Evidence

The variety of materials available to Sumerian artisans is evidence of

A) the importance of long-distance trade to the Sumerian economy.
B) the rich array of natural resources found in Mesopotamia.
C) the strong influence of Egypt over Sumerian culture.
D) how Sumerians made the most of the resources close at hand.
E) the lack of innovation in Sumerian society.