In the year 1773. I'm pretty sure.
Answer:
Melting glaciers when the lakes took their present form.
Nowadays, it's precipitation, rivers, and groundwater springs that bring new water to the great lakes.
Explanation:
The Zagros Mountains are a chain of mountains shared by Iran, Iraq and Eastern Turkey - so actually both A) and C) are correct options. They are located to the north of the area between the Tigris and Euphrates which formed a part of the Fertile Crescent.
