Context VideoBefore examining documents 3a and 3b, watch clips from the video America Before Columbus(1:27:14-1:28:11) and in synthesis chart on the positive and negative effects of the Columbian exchange. Document 3aIn Spanish Caribbean islands and Portuguese Brazil by the mid-1500s, colonists had turned to the quick and highly profitablecultivation of sugar, a crop that required constant attention and exhausting labor. They tried to recruit Native Americans, butmany died from diseases brought by Europeans, such as smallpox, diphtheria, and tuberculosis. And the Indians who survivedwanted no part of the work, often fleeing to the countryside they knew so well. European colonists found an answer to theirpressing labor shortage by importing enslaved workers from Africa. By 1619, more than a century and a half after the Portuguese first traded slaves on the African coast, European ships hadbrought a million Africans to colonies and plantations in the Americas and force them to labor as slaves. Trade through the WestAfrican forts continued for nearly three hundred years. The Europeans made more than 54,000 voyages to trade in humanbeings and sent at least ten to twelve million Africans to the Americas."Europeans Come to Western Africa." The Terrible Transformation. PBS Online, n.d. Web. 6 Aug. 2017. UNIT 9 | Interactions and Disruptions| What was the impact of the Columbian Exchange on the Old World and New World?