For most settlers, the main attraction of the western territories of the united states in the early-1800s was that

a) most of the factories were there.

b) plentiful, cheap, and fertile land was there.

c) the eastern seaboard was far too overcrowded.

d) the risk and adventure of living on the frontier.

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 a. primary sources are historical documents, and secondary sources are modern-day documents.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