What brought change in the way children are educated in the us? A. Georgia changing its flag. B. Rosa Park's refusal to give up her seat. C. Brown vs Board Education decision. D. Martin Luther King, Jr's bus boycott

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).