Final answer:
The Articles of Confederation empowered a unicameral legislature, which was the sole body of national government, with no separate executive or judiciary. This Congress held certain powers, such as diplomacy and coinage of currency, but lacked crucial abilities of enforcement and regulation.
Step-by-step explanation:
The entity that was given power by the Articles of Confederation was C- a unicameral legislature. This Congress was the central institution of national government under the Articles, with delegates chosen annually by the state legislatures. While there was a role named the 'President of the United States', this position served merely as a chairman with no separate executive powers. The Confederation Congress could conduct foreign diplomacy, borrow money, and coin currency, but it could not enforce federal laws, tax, or regulate trade due to the lack of a national judiciary and executive branches.
Under the Articles of Confederation, some powers given to the national government included the ability to exchange ambassadors, make treaties, declare war, coin currency, borrow money, and resolve disputes between the states. However, these powers were limited as Congress needed the approval of nine out of the thirteen states to enact most decisions, and any amendments to the Articles required a unanimous vote.