Correct option is C
Social movements play a crucial role in bringing about political, economic, and social change by mobilizing people towards a common cause. Their importance is reflected in the following ways:
Statement II is correct because social movements often oppose the present political regime when it is seen as unjust, oppressive, or unresponsive to public demands. Many movements arise as a reaction to government policies, authoritarian rule, or social injustice (e.g., Civil Rights Movement in the USA, Arab Spring, Indian Independence Movement).
Statement III is also correct as social movements are driven by an ideological vision to establish a system that they believe is more just, fair, or efficient. Many revolutionary movements (such as communism, democracy, feminism, and environmentalism) seek to restructure society to align with their perceived ideal system.
Statement I is incorrect because the primary goal of social movements is not to increase production in factories and industries. While some labor movements may advocate for workers' rights, better wages, or improved working conditions, their ultimate goal is social justice, not simply increasing production.
Thus, the correct answer is Option (3) – Both II and III are correct.