Answer:
Salutary Neglect is the answer for this
Forced sharecropping or tenant farming--the black codes created discrimination against blacks preventing them from other jobs or owning land.
The black codes were laws limiting the rights of freedmen and didn't allow for blacks to get land or different jobs. Being land owners still needed labor, free blacks were left with no other option but to continue working the land they had once been enslaved. It led to a system of debt and cycles of poverty which took generations before blacks saw progress.
The Cumberland Road made transportation to the West easier for new settlers. The Erie Canal facilitated trade with the West by connecting the Hudson River to Lake Erie. Railroads shortened transportation times throughout the country, making it easier and less expensive to move people and goods.
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