Final answer:
Under the Articles of Confederation, Congress was given the power to command the armed forces, but lacked the authority to regulate commerce or raise taxes and tariffs. This constraint was among the reasons why the Articles were eventually replaced by the Constitution.
Step-by-step explanation:
The Articles of Confederation provided the Congress with several powers, but it severely limited others compared to the powers held by individual states. Regarding the options provided, the specific power that the Congress had under the Articles was C. Commanding the armed forces. The Congress could declare war, make peace, enter into treaties and alliances, and conduct foreign affairs. They were also empowered to manage affairs with Native American tribes, establish a postal service, and coin and borrow money. However, among the notable powers that Congress lacked was the ability to impose taxes and enforce laws; these remained within the realm of state control. Consequently, Congress did not have the power to regulate commerce, which was left to the states, nor did it have the authority to raise taxes and tariffs.