What was a major focus of the Progressive Era legislation?

During the Progressive Era, which spanned from the late 1890s to the 1920s, a primary focus of legislation was on social reform and addressing the various societal issues that arose during this period. This movement aimed to tackle problems caused by industrialization, urbanization, and corruption in politics. Advocates sought to improve the living conditions of the urban poor, promote labor rights, enhance public health, and reduce the influence of corporate power in government.

Legislators enacted several key reforms such as child labor laws, women’s suffrage, and regulations on food and drug safety, all reflecting the era's commitment to addressing the challenges faced by American society. The Progressive movement was characterized by a belief that government could be a tool for positive change and that it should work to solve social problems, which aligns closely with the answer that highlights the importance of social reform.

In contrast, the other options do not accurately capture the spirit of the Progressive Era. For instance, decentralization of government power was not a major focus, as Progressives generally sought to increase government authority to enforce reforms. The protection of business interests without regulation runs counter to the Progressive movement's objectives, which included regulating big businesses to ensure fair practices. Lastly, promotion of isolation