Based on the responses provided, the most direct inference about the Southern economy is that "The Southern Colonies’ greatest export was tobacco." This suggests that the economy was heavily reliant on agriculture and the cultivation of cash crops, particularly tobacco, which played a significant role in the region's wealth and economic structure.
Additionally, you can also infer that "The Southern Colonies’ land was worth more because of the rich soil," which indicates that the geography and natural resources of the Southern Colonies contributed to their agricultural productivity.
The other statements—comparing the wealth of the New England Colonies and Middle Colonies or suggesting that the Middle Colonies grew more products—do not provide specific insights into the Southern economy itself, so they are less relevant to understanding the Southern economy.