In Which Way Was Ancient Egypt the Product of the Nile

In which way was Ancient Egypt the product of the Nile River?

A) It provided for a prosperous culture.
B) Yearly floods were generally destructive.
C) Fear of the river created a dark and pessimistic society.
D) The river and its marshes created a clear political, economic, and social division between Upper and Lower Egypt.
E) The Nile isolated Egypt from the peoples around them.