Evaluate the extent to which systems of slavery changed in the period va 1450 - 1750 CE

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 a. primary sources are historical documents, and secondary sources are modern-day documents.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

Compare the roles of the three countries of the central powers.

Rising and collecting taxes is an example of