Final answer:
Option A, 'Congress could not trade,' is the correct answer because it was not a weakness of the Articles of Confederation—as Congress did have the ability to trade, unlike its inability to impose taxes.
Step-by-step explanation:
The question asks which of the following was not a weakness of the Articles of Confederation. Under the Articles of Confederation, Congress was not empowered to raise money through taxes, as only state governments had the power to levy taxes. This was a critical weakness because it meant the national government could not effectively fund its operations or pay off debts incurred from the Revolutionary War. Congress did have the power to borrow money, declare war, and create land ordinances, among other things. Congress could not enforce its own laws was also true because it lacked an executive branch or national court system to do so. However, Congress was able to trade, and that option (A) is not consistent with the powers granted to Congress under the Articles. Therefore, the correct answer is A. Congress could not trade.