Answer:
Children could be paid less wages than adults.
Explanation:
In the era after Wold War I and before the Great Depression, American towns grew rapidly mostly because of the Second Industrial Revolution, which gave way to a rise of factories both in and around major cities in the US.
John Calhoun argued that the 1828 tariff helped the North at the expense of the South (c). This was the case because the tariff bolstered Northerner industrial markets but required Southerners to pay more for manufactured good.