Who were the muckrake A. Civil war veterans
B. City sanitation workers
c. Conservative politicians
O D. Journalists and reformers

D. Journalists and reformers

Explanation:

They were the journalists in the Progressive Era (1890's to the 1920's). Upton Sinclair and Ida Tarbell were two of them.

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he impacted the society ith his knowwdge and advance our research by years to come

pennsylvania pennsylvania colony was a proprietary colony founded when william penn was awarded a charter by king charles ii in 1681. he set up the colony as one of religious freedom. the government included a representative legislature with popularly elected officials. all taxpaying freemen could vote.

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