Which identifies a principle that leninism opposed? nationalization of industries free market economy one-party government dictatorship of the proletariat

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).

a because i tried to vote with just my college id and the answer was no