How did Rockefeller use horizontal integration? A.
by controlling all aspects of the production process
B.
by buying out all the competing oil companies
C.
by getting an exclusive government contract
D.
by using huge profits to eliminate his competitors

- "a new era of american politics began with jackson's election in 1828, but it also completed a grand social experiment begun by the american revolution. nevertheless, jacksonian democracy represented a provocative blending of the best and worst qualities of american society."

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missouri compromise of 1820 which prohibited slavery