Under the Articles of Confederation, Congress was unable to pass to help pay national debt. A sales tax
B an import tax
C a property tax
D income tax

B an import tax

Explanation:

During the earlier formation of articles of confederation, the constitution still haven't established Federal government's supremacy over the states.

At first, the founding fathers thought that this wouldn't be a problem. But they started to realize that they're wrong during the tax collection process.

Not having the supremacy clauses enabled the states could freely reject the request made by the Federal government without having to pay consequences. When the feds asked the states to contribute paying import taxes to pay national debt in 1780s, the states could simply ignore it because they did not have the legal obligation to do so.

china unilaterally claims the entire south china sea as sovereign territory, then builds artificial islands to bolster its claim. it suddenly activates an air defense identification zone over the east china sea, and threatens to down any aircraft that does not report its position. it builds roads into indian territory, then redraws the maps to show that it is actually chinese territory. the people's republic under president xi jinping is quickly becoming the bully of asia.