Answer:
A
Explanation:
Communism was a large movement on those days, based upon the ideas of a just and fair society. Leaders among the world were pushed toward communism, as a new way to solve the troubles with the large mass of people living in the cities and working without their humanity respected.
Sources:
Cronin, J., "Creating a Marxist Historiography: the Contribution of Hobsbawm", Radical History Review, Volumen 19, 1979, pp. 87-109.
Labouring Men : studies in the history of labour (1964) >> Trad. Trabajadores: estudios de historia de la clase obrera, Crítica, 1979.