What caused many africans to move north and south of the sahara around 2500 b. c.e.? a. the sahara began to dry out. b. arab merchants took over the region. c. the mali kingdom forbade settlement in the area. d. flooding made the region uninhabitable.

d.prevent the spread of communism outside of eastern europe.

the federalist party which advocated strong centralization dominated the united states government till 1800. so 1800 election transformed the power from one party to another party for the first time and was thus a turning point in american history. so jefferson called it "revolution of 1800".

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