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C.Most of the cities along the Silk Road used the barter system.
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Shays's Rebellion exposed the weakness of the government under the Articles of Confederation and led many—including George Washington—to call for strengthening the federal government in order to put down future uprisings.
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Standard Oil became a horizontal integration monopoly because it owned ninety percent of US oil refineries. It became a monopoly because it bought almost all of the competitors so that it managed to control almost all oil production, processing, marketing, and transportation in the United States.
<span>The Mayan economy was similar to the economy of ancient river civilizations because t</span>he Maya traded locally available materials for materials from other regions.
One of the major incidences that the rights of the sports personalities were violated was when medical reports had stated that a certain brain disorder called CTE could have a higher risk on NFL players. In contrasts, it was rejected by the NFL organisers due to lack of evidence though they must be alarmed because it concerns the welfare of their players.
