Which pair of important figures were muckrakers at the end of the nineteenth century?
a. upton sinclair and lincoln steffens
b. samuel gompers and mother jones
c. theodore roosevelt and clarence darrow
d. andrew carnegie and john d. rockefeller

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A. Upton Sinclair and Lincoln Steffens

Explanation:

In the start of the 20th century when investigative journalism started, Ida Tarbell revealed the expanding tentacles of Standard Oil, while Upton Sinclair portrayed the unpretentious reality of high meat packing and the clothes of political fraud by Lincoln Steffens. Theodore Roosevelt called these authors 'muckrakers', as many of them felt that they were in integrity and only raked muck, dirt, misdeed and scandal. His negative term remained unchanged, even as science.

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it affected it because the kingdoms (with trade) slowly got richer and richer.

there were 6 major base camps.   the base camps were located in alva, fort reno, fort sill, the madill provisional internment camp headquarters, mcalester and camp gruber.