What are the reasons for the spread of agricultural goods and technology by muslim merchants from 600 ce - 1450 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 a. primary sources are historical documents, and secondary sources are modern-day documents.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.

What is the value of x? enter your answer in the box. x =

What did hiram rhodes revels argue for in the senate