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Answer:
C
Explanation:
In the Progressive Era (a period of activism: 1890s - 1920s), a group of writers named Muckrakers were American journalists who attacked institutions and corrupt leaders exposing the issues of the American society derived from industrialization, urbanization, the rise of big business, and political corruption.
Ida Bell Wells-Barnet (1863-1931), was a muckraker american journalist, newspaper editor and sociologist; in "The Red Record" she exposed the horrors of lynching in America, particularly the lynching of black people in the south.
Its C. linking regional economies through improvements in transportation
Your answer would be D) Time zones created a standard of time that all trains followed! Hope this helps! :D
