Final answer:
The U.S. government's lack of power to regulate interstate commerce under the Articles of Confederation is the weakness being described.
Step-by-step explanation:
The weakness of the U.S. government under the Articles of Confederation being described relates to commerce and trade. The correct answer to the question is B: The national government did not have the power to regulate commerce. Under the Articles, the U.S. government lacked the authority to impose tariffs on foreign imports or regulate commerce between the states. As a result, states engaged in economic disputes, such as North Carolina and South Carolina's tariff issue. The federal government's inability to address such matters and facilitate a uniform economic policy highlighted the need for a stronger national framework to manage interstate and international commerce.