Imagine you are giving a speech to your class about reasons why the United States rapidly formed over a dozen states in the West between 1850 and 1900. Which event would be best to use as supporting evidence in your speech?
A.
discovery of gold near San Francisco, California in 1848
B.
US government overthrowing the Hawaiian monarchy in 1893
C.
US urban migration due to the Industrial Revolution after 1850
D.
completion of the Transcontinental Railroad in 1869
E.
the development of major urban areas in the northeastern United States