The correct answer for the question that is being presented above is this one: "b. Athenian democracy." The illuminated manuscripts created by the axum civilization demonstrate a clear cultural exchange between axum and which classical civilizations: Athenian democracy.
The Magna Carta established the basis for representative democracy as it was the first attempt after the fall of the classical Graeco-Roman era of a form of parliament, where nobles would meet to deliberate the course of society,and advise the kings on policy issues. It was a paradigm shift from the absolute politics and power structures of dark Europe, forming to inspire future government discussions in England and USA.
the Mongol Empire collapse for a number of reasons. the Mongols were Nomads whose Customs were suited to conquering but not ruling a large empire. the Mongols in distant Khanates were minorities, and many Mongol rulers in these places adopted local customs. Some places such as Russia cooperated with their Mongol rulers but others rebelled and the Empire eventually fell apart.