What did the Articles of Confederation establish regarding new states?

The Articles of Confederation established that new states admitted to the Union would be considered equal to the original thirteen states upon their admission. This principle was significant in promoting the idea of equality among states, regardless of when they entered the Union. It was a reflection of the desire to create a unified nation where all states had similar rights and responsibilities, ensuring that no state would hold a superior position simply due to its earlier establishment. This foundational concept was critical in helping to maintain a sense of fairness and cooperation among the states as the country expanded westward.

The other options do not accurately represent the intentions or stipulations of the Articles of Confederation. For example, the concept of a probation period or different laws for new states would create inequality and inconsistency, which was contrary to the foundational principles of the Articles. Similarly, the idea that new states would be taxed differently from original states would undermine the cohesion and unity that the Articles aimed to promote.