What company did muckraker ida tarbell write about?

She wrote about the Standard Oil Company.

Explanation:

She was an American journalist who pioneered in investigative journalism. She wrote a book called "The History of Standard Oil Company". Her work helped to dissolute the monopoly which the company possesses and influenced in the Anti-trust act enacted by the U.S. government in 1914.

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tell him great job!

explanation:

c 3 branches because idk why they had 3 well when:

you think of it there are still contrys with 3