Answer:
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The powers of Congress are affected by all of these options except the "state constitutions", since the Constitution gives Congress final authority over the states in terms of legislation.
In the early 20th century, the primary <span>cause of the large-scale migration of African
Americans out of the rural South was "</span><span>(2) opportunities for jobs in northern factories" and better treatment by whites, in general. </span>
<span>they were frequently discriminated agaisnt. </span>
