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Which of the below was significant about the Mining Frontier? (Select all that apply)
A. The gold, silver and other precious metals discovered stimulated the economy and increased the nation's wealth
B. It slowed the expansion of railroads further west due to dangerous conditions
C. Miners pushed back Native Americans, built towns, and paved the way for future settlers
D. The lawlessness of mining towns became an icon in American literature, entertainment and culture
E. It led to an increase in Geology degrees from American universities
F. Americans became interested in the West and began to move there in great numbers