5. Which innovation MOST accounted for the rise in the number of white farmers and ranchers in the American West after the Civil War.? O A Barbed wire that allowed ranchers to keep cattle in and Plains Indians out.
OB Improved railroads that replaced those destroyed during the Civil War.
OC New plows that could break the tough soil of the Great Plains.
OD Scientific methods of farming that allowed farms to flourish during drought.
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Explanation:

answer: an oligarchy is a political system in which the government is run by a group of noble families, or the elite wealthy members of a society. a present day oligarchic government is iran.

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