Answer:
Railroads used the iron to build railroad tracks but iron was weak and also dangerous. Soon people then realized that steel was a better material for tracks because it was able to hold more weight which then allowed heavier cargo. Railroads also transported mineral needed to forge steel.
Explanation:
An increase in efficiency
Under Kiev's powerful rule.
Answer:
Washington advocated tolerance of racial discrimination, while Du Bois argued that African Americans must demand their civil rights to combat racism
