Answer:
The expansion of railways meant manufacturers could ship goods cheaply.
The building of the railroads changed the environment of the West.
Explanation:
Roots of the Scientific Revolution. The scientific revolution, which emphasized systematic experimentation as the most valid research method, resulted in developments in mathematics, physics, astronomy, biology, and chemistry. These developments transformed the views of society about nature.
I do believe that, after research, it is C, Coltan.
Correct me if I am wrong, but do have a good day!
More land, Lewis and Clarke went there, fertile land
