The correct answer is A. No power to tax and no executive or judiciary.
The Articles of Confederation established a weak central government that lacked the authority to impose taxes or regulate commerce, and it did not provide for an executive branch or a national judiciary. This led to various problems in governance and ultimately contributed to the drafting of the U.S. Constitution.
Option B is incorrect because the Articles did not create a strong national army; in fact, the government had difficulty raising troops. Option C is also incorrect since the Articles of Confederation were actually quite difficult to amend, requiring unanimous consent from all states.