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 A. Primary sources are historical documents, and secondary sources are modern-day documents.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. Reset Next