9. One accomplishment of the national government under the Articles of Confederation was the passage of a law establishing --- A. A central banking system
B. A process for admitting new states into the Union
C. The president’s right to put down rebellions
D. The ability of congress to tax the states effectively

B. A process for admitting new states into the Union

Explanation:

The national government under the Articles of Confederation made the accomplishment of creating the Northwest Ordinance of 1787.

The Northwest Ordinance created a new method to admit new states into the Union from the Northwest Territory.

This territory included the modern-day states of Wisconsin, Michigan, Illinois, Indiana, and Ohio.

So, the correct answer is B.

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