This is known as the Columbian Exchange; option A. This includes for example Coffee and Chocolate (the plants); which are today to a great degree cultivated in a continent different than the one they originally evolved on.
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Answer:
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Generally they can no loger drive car in insurgent or formerly insurgent controlled areas, they must walk right along the side of the road so they don't get blown up by land mines. Generally many fled because land mines ruined their lives even after the insurgents left.
Probably the main reason Africans, rather than Native Americans, became slaves in America was that D. Africans and Europeans shared immunities to Old World diseases.
Ans: Nationalism lead people to conflict. Archduke Franz Ferdinand was assassinated due nationalism by the Black Hand, a nationalist group that intended to liberate the Serbs from the Austro-Hungarian occupation. The death of Franz Ferdinand was one of the most important factos to cause the World War I.