Final answer:
Both the Articles of Confederation and the U.S. Constitution created a Congress, with the former establishing a single-house legislature and the latter maintaining the legislative body within a stronger federal government structure.
Step-by-step explanation:
The correct answer to the question of which document created a Congress is c) Both the Articles of Confederation (AC) and the Constitution. The Articles of Confederation established a national government that consisted solely of a Congress, with no separate executive or judiciary, to act as a unifying body during the early years of the United States. After the realization that the Articles created a government that was too weak to effectively govern, the U.S. Constitution was drafted to create a stronger central government. This new Constitution maintained the Congress as part of a more complex system with additional branches for executive power and a judiciary to enforce its laws.