Answer:
D.) they forced states to accept a single currency
Step-by-step explanation:
They forced states to accept a single currency is not a weakness of the Articles of Confederation. In fact, the Articles of Confederation did not establish a national currency, and each state was free to issue its own currency. This was one of the major weaknesses of the Articles of Confederation, as it led to economic instability and made it difficult for the central government to pay its debts.