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the answer is c. Brazil wants students to bring scientific and technological knowledge back to Brazil
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The Ghana Empire properly known as Wagadou (Ghana being the title of its ruler), was a West African Empire located in the area of present-day southeastern Mauritania and western Mali.
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The Mongol Empire was noted for its sheer military power, a rapid communication system based on relay stations, paper currency, diplomatic immunity and safe travel under Pax Mongolica. These features facilitated the growth, strength and flexibility of the Empire in responding to ever-changing circumstances.
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