Arts & Humanities » History » Because of the effects of perennial irrigation, Egyptian farmlands have _____.?

Because of the effects of perennial irrigation, Egyptian farmlands have _____.?

a.dried out the Nile River
b. drained Lake Nasser
c. developed low salt content
d.developed high salt content

I would say both rivers have lower water levels due to the construction of dams and evaporation.

c.