The earliest railroads in the United States
SELECT AN ANSWER

allowed farmers to get their goods to market faster

improved travel between cities in the East

made possible travel to unsettled regions in the West

drove steamboat lines into bankruptcy

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 a. primary sources are historical documents, and secondary sources are modern-day documents.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