Which statement describes a change under the roman empire? 1 answer a. a civil service opened goverment jobs to men regardless of class b. democratic governace put more power in the hands of more citzens c. religious perscution declined with laws protecting religious freedom d. the construction of walls along the roman border improved security

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).

these civilizations were located around fertile rivers, where they could produce an abundance of crops