The growth of socialist parties was linked with the politics of which class?

Correct answer: Working class

Socialism developed as a response to serious inequalities associated with industrial society. Factory workers often faced long hours, low wages, unsafe conditions and little control over production. Socialist thinkers and parties argued that workers should organize and that wealth and economic power should be distributed more fairly. Consequently, socialist politics became closely connected with the working class, trade-union activity and demands for social and economic reform.

Option A is correct because the growth of socialist parties was linked mainly with working-class politics. The royal class, feudal warriors and court artists were not the social group whose collective economic problems gave rise to this movement. The answer does not mean that only workers ever supported socialism; rather, workers formed its central social base in this historical context. The supplied answer is accurate and suitable for the question.