The weaknesses of the Articles of Confederation that highlighted the need for a new and stronger federal government primarily include:
B. How to resolve disputes between states over land
C. Confusion over different state currency
These issues contributed significantly to the difficulties faced under the Articles of Confederation, leading ultimately to the drafting of the U.S. Constitution. The other options (A and D) do not directly reflect the primary weaknesses that prompted the change to a stronger federal government.