The early roman republic devised a set of institutions that over time promoted in roman politics especially after the struggle of the orders ?

your answer would be (a)

where is the diagram

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).

we need the pie chart in order to