How did Lincoln Steffens help expose the corruption of machine politics?

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During nine years of New York City newspaper work ending in 1901, Steffens discovered abundant evidence of the corruption of politicians by businessmen seeking special privileges. ... With Ida Tarbell and others Steffens cofounded The American Magazine in 1906. Many nationwide lecture tours won Steffens recognition

During nine years of New York City newspaper work ending in 1901, Steffens discovered abundant evidence of the corruption of politicians by businessmen seeking special privileges. ... With Ida Tarbell and others Steffens cofounded The American Magazine in 1906. Many nationwide lecture tours won Steffens recognition.

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d. because dr. laguardia selected a widely used measure, his study generalizes to has strong external validity. external validity has limited external validity. other applications of this measure.

the widely used measure that he applied to his experiment was the benton facial recognition test. it employed on to football players and as result, only players who suffered brain concussions did not pas this test. and although it has an external validity, it is limited because it isn't general to apply to other population.

answer; /// direct cinema limits the use of narrators; ; ; and: : : : allows the audience to observe events as they occur;