Which happened as a result of the american civil war? a. the united states ended slavery within its borders. b. the united states became a poorer country with less industry than it had before the war. c. the untied states wrote a new constitution and system of government. d. the united states reformed as two nations.

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 a. primary sources are historical documents, and secondary sources are modern-day documents.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.