What were the flaws of the Articles of Confederation: All of the above. Which Plans sought to fix the problems created by the Articles: The Virginia and New Jersey Plans. What was in the Constitution: Checks and balances, Bill of Rights, legislature codifying slavery. Why did the Compromise of 1790 occur: Debates were held over how the US would pay off its wartime debts. How far back did the abolitionist movement go: Late eighteenth century. Why was the Constitution written in the first place: All of the above