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Answer:
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Explanation:
A.
He used dozens of websites and social networking sites to mobilize millions of donors.
<span>The Reconstruction was the period of American History directly after the Civil War in post-slavery America. The promise of change for newly freed slaves fell short, with many African Americans continuing to work in slave-like conditions (sharecropping) and encountering severe discrimination.</span>
The 16th amendment in 1913 permits Congress to lay and collect taxes on incomes, from whatever source derived, without apportioning it among the states or basing it on the US Census. Ratification was completed on February 3, 1913. Before that customs duties and excise taxes were the primary sources of federal revenue. Answer: The ratification of the 16th amendment.