Approval of the articles was delayed by the conditions that various states placed. The prevailing arguments included the need for a stronger central government which became apparent as the weak federal government had no powers to raise revenue or raise an army. There was also the argument that such a step would result in tyranny
Individual rights are explained in the constitution as inalienable and granted upon birth by our creator, while a balanced government is seen in the checks and balances system with three branches to control each other and prevent others from gaining too much power.
Your 2nd and 3rd options are the correct answers. Monarchies were not quickly changed into democracies because it was much more complicated to change a government. You can't do that overnight.