C. increased settlement in the West <span>was a direct result of the growth of the railroad industry.
The development of railroad industry make it easier from people all over the country to travel to the west and open their business there.
It also allowed easier distribution that make it possible for the western frontier to sell their products to all over the country</span>
When having pride of a certain country, it is called nationalism.
Too much nationalism can cause problems, one of the causes of WW1 was nationalism.
