The answer is A. Interact with water supplies
Answer and Explanation: "On a map, the Fertile Crescent looks like a crescent or quarter-moon. It extends from the Nile River on Egypt's Sinai Peninsula in the south to the southern fringe of Turkey in the north. The Fertile Crescent is bounded on the west by the Mediterranean Sea and on the East by the Persian Gulf." - Fertile Crescent, History
"They promised bills and laws in favor of immigrants in exchange for votes" is the one way among the following choices given in the question that political machines, such as Tammany Hall, work with and for immigrants.
The western empire had lost most of its political, religious, and economic power
Because they managed to lost the power to use their original language and replaced by another
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