Answer :
D. The process of national economic integration and consolidation that followed the Civil War was driven forward by the rise of cities like Chicago, where grain, meat, and lumber were processed on an unprecedented scale.
The war created a large demand for goods, and as a result, the industrial production of goods such as steel and textiles increased. This increase in industrial production created a need for transportation infrastructure, which was aided by the Homestead Act and grants of land to railroads.
This allowed for the development of new railroads, which connected the nation's cities and allowed for the efficient transportation of goods. Additionally, the banking system was modernized following the war, allowing for easier access to credit, which further increased the efficiency of the new transportation infrastructure.
These developments allowed for a greater level of integration of the nation's economy, as goods were able to be transported with ease, and with access to credit, businesses were able to invest in production. Overall, these developments allowed for the development of a stronger and more efficient national economy following the Civil War.
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