The u. s. government contributed to the building of the transcontinental railroad by
a. not allowing immigrants to work for railroad companies.
b. collecting extra taxes from the industries that would use the railroad.
c. awarding loans and land grants to private companies to build the railroad.
d. assigning the army to lay out a path for the railroad.

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 a. primary sources are historical documents, and secondary sources are modern-day documents.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