The berlin conference in 1884 was significant
because it
(1) promoted belgium as a world power
(2) established rules for the european division of
africa
(3) called for a war against england
(4) ensured ethnic harmony in the middle east

this question makes no sense dude

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).