One of the major flaws of the Articles of Confederation was that it didn't establish any mechanism of governance to deal with interstate disputes or anyway to enforce laws or agreements across the colonies. Because the Articles of Confederation established such a weak central authority the Constitution was explicitly written to correct this problem, and establish a government that could govern the states in an effective way so that they could function as a nation.
I think his major accomplishment is C. Victory in the korean war
Brazil had won its independence in a bloodless revolution. How was the Haitian Revolution different from revolutions in the rest of Latin America? It was the first black colony to free itself from European control; Haiti was a French colony while the rest of the colonies were either under Spanish or Portuguese.
He was known for establishing and governing the settlements of New France and in Quebec. I hope this helps!