Answer:
Soon dining facilities across the South were being integrated, and by July 1960 the lunch counter at the Greensboro Woolworth's was serving Black patrons. The Greensboro sit-in provided a template for nonviolent resistance and marked an early success for the civil rights movement.
Explanation:
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B. A graph showing the number of Native America’s between 1492 and 1600.
I think this is the best answer because the question places emphasis on STUDYING the effect of germs exchanged, not what type of germs were exchanged.