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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What is the main difference between primary and secondary sources? a. primary sources are historical documents, and secondary sources are modern-day documents. b. primary sources are derived from museums and archives, and secondary sources are created by history students and academics. c. primary sources are found in ancient places with a rich history, and secondary sources are found in historical journals and blogs. d. primary sources are created during a particular historical era, and secondary sources are created by studying primary sources.