I think its A hope this helps
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Lee Harvey Oswald
According to Wikipedia and History.com
Five government investigations concluded that Oswald shot and killed Kennedy from the sixth floor of the Texas School Book Depository
Hi! I think there's no image of the chart but I'd like to answer about the Columbian exchange that might be the answer. The Columbian Exchange started was the widespread of trading of Americans and Afro-Asians and was followed by the voyage of Christopher Columbus to the Americas in 1492. They were exchanging plants, animals, technology, ideas, diseases and human populations.