07.01 mc)which pair of ancient civilizations were ruled by dynasties? china and egypt china and the indus river valley the indus river valley and mesopotamia egypt and mesopotamia

It is A China and Egypt

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).