Final answer:
Tobacco was the crop that stimulated the economy the most in Kentucky and North Carolina in the 1880s.
Step-by-step explanation:
In the 1880s, the crop that stimulated the economy the most in Kentucky and North Carolina was tobacco. Tobacco production and trade had a significant impact on both states during this period. The demand for tobacco grew rapidly, leading to increased cultivation, employment opportunities, and revenue for these regions.
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