Why did a money economy begin to replace the barter economy in the high middle ages?

as wars halted trade, merchants found new work metalsmithing or creating coins.

as trade expanded to cover greater distances, a unit of exchange became more important.

eastern merchants banded together to reject the barter economy in europe.

western merchants were no longer willing to negotiate trade agreements with eastern nations.

The best and most correct answer among the choices provided by your question is the second choice.

Money replaced barter as a medium of exchange during the Middle Ages because as trade expanded to cover greater distances, a unit of exchange became more important.

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The answer is (A large majority of African Americans were slaves.)