Answer: B
Explanation:
Before 1960, Africa was governed by European countries such as Portugal, France, and Great Britain.
<span>In the late 1800s, people in many parts of the world decided to leave their homes and immigrate to the United States. Fleeing crop failure, land and job shortages, rising taxes, and famine, many came to the U. S. because it was perceived as the land of economic opportunity.
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The conflict and existence of slavery in Africa, particularly on the west coast, facilitated the importation of slaves to New World. Rather than having to invade Africa and attempt to take people by force, European slave traders were able to, "legally" but no less horrendously, negotiate the purchase of already-enslaved peoples from other Africans. This made repeat-purchases much easier, and helped to increase the scale of the transportation of slaves across the Atlantic.
This is not to say that Europeans never took African slaves by force, but a great number were purchased as slaves from African slave-owners or people hostile to the enslaved groups.
The growth of European states as empires (also known as imperialism) can be considered as a major cause of World War I, since as countries such as Britain and France extended their empires, tensions among European countries escalated. Germany's drive for overseas colonies sparked armed clashes with established imperial powers.