It was called "Army of the Potomac"
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The southern factories were built to serve the interest of farmers because these industries were agricultural based which implies that there would be more benefit in having related industries in the region. This would help in cutting costs such as transport which meant higher benefits for farmers.
The correct answer is C.
In 1867, the political battle between President Johnson and Congress over southern Reconstruction came to a confrontation. And 1877 Congress passed Electoral Count Act Hayes became president Hayes removed remaining troops from the South to end Reconstruction. The Republicans promised that if Hayes was elected, he would withdraw the last of the federal troops from the south, allowing the only remaining Republican Reconstruction governments to collapse.
It seems to most likely be D) It offers an example of civil disobedience.
Hopes this helps:
Answer: C. Rachel Carson