The invention of the wheel . expanded trade
had no effect on trade
reduced trade

Expanded trade

Explanation:

With the wheel people could now bring goods along with them on roads since goods were the only form of currency at the time this was very important. Without the wheel, the amount a person could carry was very limited, the wheel also made trade and travel much easier and faster. It increased the distance one could travel with goods, this helped trade because one person could trade with more people for more goods in less time.

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industry had made the u.s. the richest nation in the world at this time. the second industrial revolution caused growth in industry and transportation, which allowed increased trade between nations. click to let others know, how is it