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.

the answers is b.   environments.