How would the 3 parts of the American system help to make the country self-sufficient?

The three parts of the American system—internal improvements, a protective tariff, and a national bank—were designed to foster economic independence. Internal improvements, such as roads and canals, facilitated trade and transportation, linking markets across the country. A protective tariff encouraged domestic manufacturing by making imported goods more expensive, thus supporting local industries. Meanwhile, a national bank stabilized the currency and provided credit, enabling easier access to capital for businesses, all contributing to a more self-sufficient economy.