Ida Tarbell exposed the monopolistic practices of Standard Oil Company through investigative journalism.
Ida Tarbell was a talented researcher and journalist who exposed the monopolistic practices of John Rockefeller's Standard Oil Company. She wrote a series of articles in 1902-03 that exposed the secret bookkeeping, bribery, sabotage, conspiracy, and other machinations of the Standard Oil monopoly. Her work led to the breakup of Standard Oil as a monopoly.
https://brainly.com/question/42708483