How did the Mediterranean Sea contribute to the expansion of the Roman Republic?

The Mediterranean Sea was one of the main trade links used between all the different continents and regions of the Roman Empire.

the answer is b hope that

attacks by the seljuk. a devastating blow to the entire byzantine world was dealt by christian crusaders from the west. the venetians were eager to destroy byzantine power and offered the crusaders money, ships, and part of the spoils of war.

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