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.

ummm? is that supposed to be a question or a but this is a reason he won re-election

explanation:

"despite progress in the war, lincoln and most political pundits were convinced that he would lose his bid for reelection in 1864. the country was war weary and the democratic party's nominee, george mcclellan, was likely to negotiate a peace treaty with the confederacy if elected." - loc.gov