Why was it difficult for Congress to fulfill its duties under the Articles of Confederation?

Question

Congress lacked the power to regulate foreign trade
Any congressional action required the executive approval***
Most congressional decisions required the approval of at least nine states
Congress lacked the power to declare war

Answer 1

https://www.google.com/search?q=congress+in+articles+of+confederation&oq=congress+in+articles+of+confederation&aqs=chrome..69i57.7325j0j7&sourceid=chrome&ie=UTF-8

I hope you used Google for this question last night rather than waiting for someone else to do so. =)