Answer: I think it is B. Levees held back the annual floods of the Tigris and Euphrates Rivers.
Explanation:
it was in the Nile river, the French didn't build it, it was completed in 1970
The presidents most important is other characteristics can be business or the laws the president makes, how the president wants to make sure the world is okay and is on track. no conflict on wars or any nuclear wars starting. a president that is fair, with equality, of religion, points of views and etc
I believe the centers of learning and art in the early middle ages were in monasteries.
