What is the difference between primary and secondary sources?
a. primary sources are very old, while secondary sources are created recently.
b. primary sources are firsthand accounts, while secondary sources are created after the fact.
c. primary sources are always reliable, while a secondary source's reliability depends on its creator.
d. primary sources are created by regular people, while secondary sources are the work of experts.

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 a. primary sources are historical documents, and secondary sources are modern-day documents.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