The answer is A. John C. Calhoun
The plague likely started in Asia and traveled westward along the Silk Road. The disease was carried by fleas that lived on rats.
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Primary sources are most accurate. But, secondary sources help with research as well.
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The League of Nations, abbreviated as LON, was the first worldwide intergovernmental organisation whose mission was to keep world peace. It was founded on 10 January 1920 following the Paris Peace Conference that ended the First World War, and ceased operations on 20 April 1946.
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Shows different points on the map of Greece.