I think it’s Tax Revenues
The statement that correctly describes the beginning of the decline of the Roman Empire would be "<span>a. Very few Roman emperors in the centuries after Augustus were competent rulers; most were insane, greedy, or both," since this led to a loss of power consolidation and insurrections on the "edges" of the empire. </span>
The anicent Native Americans (just as they are today) were a varied peoples, with varied cultures, and varied religious beliefs which can be compared to many other religions from the ancient world. Therefore, the three equally correct answers are: the Mesopotamians, Hyksos, and Egyptians, since those three were all civilizations based around river valleys.
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PLEASE MAKE SURE YOU HAVE PUT THE PROPER QUESTION AND IT IS COMPLETE