Final answer:
A "muckraker" is another term for an investigative journalist who exposed social, political, and economic injustices during the late 19th and early 20th centuries.
Step-by-step explanation:
A "muckraker" is another term for an investigative journalist. Muckrakers were investigative journalists in the late 19th and early 20th centuries who exposed social, political, and economic injustices through their writings. They played a crucial role in raising awareness about corruption, child labor, working conditions, and other societal issues during the Progressive Era.
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