a money economy begin to replace the barter economy in the high middle ages because : B. as trade expanded to cover greater distances, a unit of exchange became more important
Imagine a condition the merchants have to to some business in a far away land. In a barter system, the merchants have to bring their good + another goods that is used for payment and double their cargos . By using gold coins, they can spare more space for another cargos since it all can be putted in a box
hope this helps
