It consists of mainly of bulling
Nation's credit determines the fiat currency.
Slavery and the start up of the government
The basic cause of the Indian Wars between 1860 and 1890 was the fact that the Americans wanted the land that the Indians had and the resources that might be in and on that land. The earliest wars were brought on to some degree by the Civil War, but the basic cause was still the American desire for more land and resources.
By the time American troops entered World War 1 the Allies were exhausted after years of fighting. The correct option among all the options that are given in the question is the third option or option "c". The entry of Americans in the war boosted the morale of the Allied army. I hope the answer comes to your help.