The correct answer is letter B.
Explanation: Nationalism is an ideology that arose in the nineteenth century when nation states were affirmed in Europe.
The term is used to describe the sentiment and attitude that members of a nation have when forming national identity.
Nationalism was fundamental as an ideology for German Unification and Italian Unification. Both territories were made up of small states independent of each other, but united by the same past.
The best answer in regards to the specific question appears to be A: Many small towns boomed as people came to drill wells.
I believe it was a trade route that was used commercially. Traders often used this route because it stretched so long and wide across the US.
The use of trench warfare on the Western Front was a major military strategy that led to four years of war on the Western Front during World War 1 (1914-1918). The armies which comprised of millions faced each other in a line of trenches which extended from the Belgian Coast through to the North Eastern part of France and Switzerland. This resulted in combat between the German troops and the Allied forces of Britain, France, and later the United States.
The corruption within the communist Chinese government, lack of freedom of speech, press, and restriction on political participation. Inflation and the democratic movement in Eastern Europe are triggers of the incident.