The correct answer is:
D. It gave Congress the authority to regulate trade among the states and foreign nations.
The Commerce Clause, found in Article I, Section 8 of the Constitution, grants Congress the power to regulate commerce with foreign nations, among the several states, and with the Native American tribes. This was designed to address the weaknesses of the Articles of Confederation, which did not provide a strong central authority to regulate trade, leading to economic difficulties and trade disputes between states.