c) Ida Tarbell

Ida Tarbell gained fame for exposing the Standard Oil Company’s practices through her journalism. Her series of articles, published in “McClure’s Magazine” in the early 1900s, detailed the unethical methods used by John D. Rockefeller to monopolize the oil industry. Tarbell’s investigative work was a landmark in muckraking journalism and played a significant role in the development of public opinion against monopolies and in favor of antitrust legislation.