how are the differences of the American national anthem and the French Revolution reflect each country's revolution

How did the incas unite the andes mountains?

Did everyone shared in the economic prosperity of the 1920’s

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 a. primary sources are historical documents, and secondary sources are modern-day documents.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