The correct answer is D: Noth America, Europe and Africa. This system consisted in exporting commodities that were not necessary in an specific region and that probably was needed in another one. For example, America would export sugar, tobacco and cotton to Europe, while Europe would export textiles, rum and manufactured goods to Africa; and the last one would export slaves to America.
The movement of tectonic plates caused Pangea to break apart and drift away through the ocean, earthquakes and eruptions of volcanoes caused the land to break up.
The hoop stress is the force exerted circumferentially (perpendicular to the axis and the radius of the object) in both directions on every particle in the cylinder wall.
