The correct answer is B) gave the government too large a role in the economy.
The main reason why Democrats opposed the American System was that they believed it gave the government too large a role in the economy.
After the War of 1812, Senator Henry Clay devised the "American System" that was a program that involved the participation of the government to sponsor programs aimed to help and balance the economy of the country, help the farmers, and support American businessmen. However, Democrats considered a risk the large participation of the government in the economy.
