After Being Conquered by the Persians, Mesopotamia

After being conquered by the Persians, Mesopotamia

A) became the capital of the much-expanded Persian Empire.
B) became an example to the Persians of adapting to the environment via irrigation.
C) never again held sway politically, until the twentieth century.
D) adopted the cultural ideals of their conquerors.
E) was weakened by overuse of the land, and it was also changed by a warmer, drier climate.