Irrigation in Iran Was Different Than Other Areas Because of the Large

Irrigation in Iran was different than other areas because of the large desert plain. How did they compensate for this?

A) digging long canals to the few interior lakes for transportation of water to crops.
B) vertical shafts provided access to underground irrigation.
C) construction of the earliest known water wheels moved irrigation across long distances.
D) they had no agriculture but relied solely on mineral resources.
E) they built dams and reservoirs to capture the mid-summer monsoonal rains.