Read the excerpt from the Articles of Confederation.

All charges of war, and all other expenses that shall be incurred for the common defense or general welfare . . . shall be defrayed out of a common treasury. . . . The taxes for paying that proportion shall be laid and levied by the authority and direction of the legislatures of the several States within the time agreed upon by the United States in Congress assembled.

Which point in the excerpt reveals a weakness of the Articles of Confederation?

The national government cannot create a common defense.
The common treasury does not receive enough tax from the state.
Congress cannot convene without state permission.
Taxes are laid and levied by a common treasury.