B. An Ice Age ended and the planet warmed up.
Answer:
maintain the European balance of power, political boundaries, and spheres of influence.
Explanation:
I think this is because of the major plantations in the south. the north had plants or crops but only substantial (enough to feed family). the north mainly focused on things like their ships and other major industries. the south focused on plantations and had little to no industries
The Nubians rule for half a century. Hope this helps
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