Which Native American played a key role in the Civil War? (1 point) O Ely S. Parker
o Susie King Taylor
Harriet Tubman
0 Frederick Douglass

Abraham Lincoln, Jefferson Davis, Clara Barton, Robert E. Lee, Ulysses S. Grant, Stonewall Jackson and William Tecumseh Sherman played notable roles before, during and after the civil war

Explanation:

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an informal structure in a bureaucracy would be something like so-called "office politics". where there's a formal structure set up for the organization, but then an informal subculture as well that has a way of organizing the bureaucracy further. this can be positive because it sets up an added degree of organization, albeit informal, within the bureaucracy.