Answer:- Armed rebellions had begun to arise in several states, in particular shay's rebellion.- Congress couldn't afford to order union troops to quell emerging rebellions.
Explanation:Troubles with the existing Confederation of States finally convinced the Continental Congress, in February 1787, to call for a convention of delegates to meet in May in Philadelphia "to devise such further provisions as shall appear to them necessary to render the constitution of the Federal Government adequate to the exigencies of the Union."