Final answer:
The economic advantage of naming Constantinople as the capital of the Eastern Roman Empire was its strategic location near land and sea routes, which boosted trade and commerce.
Step-by-step explanation:
One economic advantage of naming Constantinople as the capital of the Eastern Roman Empire was that it was located near land and sea routes. The city's strategic location made it a major center for trade and commerce, allowing for easy transportation of goods and resources. This contributed to the economic prosperity of the empire as it facilitated the development of a thriving market.
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