Roy is an archaeologist. During a recent archaeological dig in China, he discovered a clay tablet that contained a series of diagrams about plants and trees. After further investigation, he discovered that the tablet contained records kept by a renowned gardener from ancient China. Based on this information, what type of primary source is this tablet?

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 a. primary sources are historical documents, and secondary sources are modern-day documents.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