According to Aristotle, why was pure democracy a corrupt form of government?

Aristotle rejected Athenian democracy on the basis that such democracies were anarchic societies without internal unity, that they followed citizens' impulses rather than pursuing the common good, that democracies are unable to allow a sufficient number of their citizens to have their voices heard

Aristotle considers constitutional government (a combination of oligarchy and democracy under law) the ideal form of government, but he observes that none of the three are healthy and that states will cycle between the three forms in an abrupt and chaotic process known as the kyklos or anacyclosis.

the conditions that made the byzantine empire vulnerable to attacks by the muslin turks were the sack of constantinople by western crusaders, the conquests of the sultanate of rum, presence of rival kingdoms and finally the set up of fiefdoms at the empire which were owned by the ghazis (turkish warriors).

the answer would be:

b. race