Answer:
the feedback on the question is: "The fact that kings reserved the biggest pieces of gold for their own treasure chests suggests that they viewed their positions in a way that was similar to European kings and feudal lords. The social order was hierarchical--more like Europe and less like Arabia during the Middle Ages (though the Ottomans eventually developed a hierarchy of sorts to rule their vast empire)."
so i'd say it is the answer "The social order of Ghana was just as hierarchical as the social order in medieval Europe."