The excerpt discussing the role of muckrakers is most closely associated with which aspect of the Progressive movement?

The focus on muckrakers encapsulates the spirit of investigative journalism that emerged during the Progressive movement. Muckrakers were journalists who sought to expose the societal ills and corrupt practices of powerful entities, including businesses and government officials. Their work played a pivotal role in revealing issues such as corruption, corporate greed, and social injustices, thereby informing the public and prompting calls for reform.

The rise of muckraking journalism was crucial in raising awareness about the need for reform and holding those in power accountable. For instance, figures such as Upton Sinclair and Ida Tarbell brought critical issues to light, which in turn galvanized the Progressive movement and inspired legislative changes aimed at curbing corruption and improving society.

While the other choices touch on significant issues addressed by the Progressive movement, they do not specifically reflect the unique contribution of muckrakers. Political reform efforts and social justice campaigns encompass broader aspects of activism and reform beyond journalistic efforts. Economic reforms for the working class focus primarily on labor rights and economic equity, which, though interconnected, differ from the investigative intent of muckraking journalism. Hence, the correct association of muckrakers is with the element of journalistic exposes of corruption, which was foundational to the Progressive movement's success.