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What characteristics allowed southern Mesopotamia to become the cradle of civilization? Select the two correct answers.

A.
Nomads developed aggressive herding techniques.

B.
Flooding of the Tigris and Euphrates Rivers brought good soil.

C.
Farmers developed technology for irrigation.

D.
Tribes built deep wells and extensive cooling structures for crops.

E.
Engineers developed ways of extracting usable fresh water from the salt water.
PLEASE HURRY!