D. Freely elected governments.
Your answer would be A). Trade
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Naples had a huge advantage when it comes to trading because of where they're located. They are a harbor on the Mediterranean sea, and there is a lot of people that cross the Mediterranean sea to trade. Because they are next to the sea, they can trade with people internationally. They are right next to Rome, so traders that are going to Rome could possibly pass by Naples and trade with them too.
