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Answer is b. the ownership of slaves.
Owning slaves on large scale is a privilege the rich and powerful people enjoys, giving them large benefits of enjoying their slaves’ rewards of labor. Slave owning indicates not just the wealth one has, even the political influence and social prestige.<span>
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The feature that helped Timbuktu make it a center of intellectual advances and culture is the "Library." Books themselves are very intellectual in its nature. It was in the <span>Askia dynasty that Timbuktu felt its prosperity in intellectual advances. </span>
They were going to explore the East Coast and explore Louisiana
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"Do. Or do not. There is no try." -Yoda
