The correct answer is D) protective tariffs (to keep foreign goods more expensive than American made goods to help American businesses).
In Henry Clay's "American System," new transportation systems to link the Midwest and North would be funded by protective tariffs (to keep foreign goods more expensive than American made goods to help American businesses).
Henry Clay (1777-1852) was the leader of the Whig Party and a prominent figure in the decision making of the United States. He was Secretary of State and Senator. He was the creator of the economic program for the United States called "the American system," that included a national bank, a protective tariff, and government subsidies for transportation plans.
In the early 1700's South Carolina raised the import duties on slaves coming from the West Indies, which most likely resulted in C; More slaves being imported directly from Africa. This is so because it was relatively cheaper to import directly from Africa opposed to the West Indies.
