During half the 1800s, the south economy relies on the plantation system. Thus the correct answer is D.
<h3>What is the economy?</h3>
An economy of the country is defined as the production and consumption of goods taking place in a country that determines the purchasing parity of individuals and the flow of cash in the market.
The plantation system mainly refers to agricultural activities where crop production will be done and crops sells in the market. Mainly cotton was the most profitable for selling in the market.
The cost invested in doing plantation was lower than the profit achieved. Therefore, option D is appropriate.
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