There are several reasons why the role of the federal government in civil rights enforcement changed, but the main one is that southern states were not enforcing federal laws.
Answer:
A, export food to other countries
<span>When examining how Rockefeller became successful, notice that he owned absolutely everything regarding the production and transportation. This means that the answer is C) Combined vertical and horizontal integration. He became a monopoly owner meaning he owned everything regarding the production of oil and didn't rely on anyone.</span><span />
andrew jackson changed the voting rights.