Answer:
D rebuild the southern economy
Answer:
it was both good and bad for them. it was bad because they were limited to national imports and exports only. they had to rely on the little resources they had on their islands alone to survive. When they were finally ready to become unisolated and join the rest of the world, they were really far behind on their industrial era. it was good for them because it meant very little conflict with other nations.
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Civil wars. Probably the most important single cause of Byzantium's collapse was its recurrent debilitating civil wars. Three of the worst periods of civil war and internal infighting took place during Byzantium's decline.