The correct oprion is C
Communism is a social system, as well as a mode of socioeconomic organization, characterized by the common property of the means of production, the absence of private property in the means of production and the absence of social classes and a State. Most variants of communist parties have adopted a historical categorization of the past and the social future of the West according to the demarcation of modes of production established by Marxist doctrine: primitive communism (without classes), slavery, feudalism, mercantilism, capitalism, and finally the communist mode of production (without classes), divided into two phases, whose realization would be in the hands of the social class called proletariat organized under the leadership of a revolutionary communist party, and which would disappear as a class during the realization of it.
