The answer to this would be C. The other two would not make sense or fit for the time period. Also c is true, just learned this in history too!
The answer would the Columbian Exchange.
Answer:
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<span>Mixed market economies focus on preserving as much freedom to make economic choices as possible. Governments in these economies have limited involvement in managing and regulating the economy. In contrast, command economies are focused most on preserving and requiring equal opportunities, which means governments that greatly regulate the economy. More economic systems are geared toward offering producers and consumers the freedom to make economic choices, so mixed market economies are more common in the world today.</span>
