Group of authors and journalists wrote of horrible working conditions in american industry in the early 20th century, resulting in more governmental protection of workers.

Muckrakers

Explanation:

Muckraker is the name given to the authors and journalists who exposed the political and economic corruption prevalent in American society during the progressive era. Muckraker at that time was used to denote these authors by politicians for their extreme criticism. But investigating journalism by these groups of people unfolds the ill side of industrialization such as urban poverty, child labor, prostitution, political corruption, etc.

the main objectives of the progressive movement were eliminating problems caused by industrialization, urbanization, immigration, and political corruption.

answer should be c..