Which of the Following Cannot Be Attributed to the Sumerians

Multiple Choice

Which of the following cannot be attributed to the Sumerians?

A) Development of the first urban civilization in Mesopotamia
B) Transformation of swamps into fields of barley and groves of date palms
C) Frequent warfare amongst themselves and with invaders from the north and the south
D) Incorporation into various kingdoms and empires
E) Establishment of Sumerian as the common language for 3000 years of Mesopotamian history