Final answer:
Canals and railroads were crucial to American development as they enabled faster shipment of goods and travel, catalyzed economic growth, and facilitated the emergence of a national market system.
Step-by-step explanation:
Canals and railroads were vital to American development primarily because they allowed people to ship goods and travel faster (c), thus facilitating economic growth and the emergence of a national market system. During the 19th century, the construction of canals like the Erie Canal, and the advent of railroads, transformed American transportation, linking port cities to the interior and enabling the shipment of agricultural products and manufactured goods across the country.
This integration of transportation systems also supported coal, iron, and steel industries, and provided employment opportunities, fueling the burgeoning U.S. economy.
With the invention of the steam engine by Robert Fulton and the expansion of the steamboat and railroad lines, goods could be transported more quickly and cheaply.
The construction of the Erie Canal in 1825, which connected the Northwestern territories with global markets, and the later railroad expansion, significantly reduced shipping costs and travel time. Moreover, transportation infrastructure like the spread of railroads and telegraph lines helped the United States govern vast lands more effectively and gradually turned the nation into a well-connected entity.