Earthen mounds
The city of Cahokia was founded by Mississippian culture near the current day city of St. Louis, MO.
Cahokia is known for the large earthen mounds created by tribes of the Mississippian flood plains. The large mounds were used as burial sites as well as tributes to the gods of the Cahokian people. This large site is believed to be the center of Mississippian tribes living up and down the river and connected by their mound building culture.
Concept of causation: When one event happens because of another.
In history, it is rarely the case that there is a single cause of an event. There are often multiple causes and factors and motivations that all play into the unfolding of historical happenings. Reformation historian Roland Bainton said, "The sum of the matter is that causation is exceedingly difficult to assess. One can do no more than offer a plausible conjecture." Bainton believed there were causes of events in history, but that there could be much investigation and debate about the complexity of those causes. That's part of our work as historians -- to investigate different possibilities and theses and see which are the most likely factors in causing events to unfold as they did. And as we make our assessment of causes, we remain open to the possibility that new evidence might surface that will change our understanding of causes of what happened in the past.
I would say the correct answer is D. Austria-Hungary would no longer exist if every ethnic group got its own independent territory.
As you can see, Austria-Hungary consisted of many ethnic groups at the time, including Germans, Poles, Slovenes, etc. What this meant for the nationalism is that each of these ethnic groups wanted their independence and to separate from Austria-Hungary. And if they did that, there would no longer be Austria-Hungary, but rather a bunch of new countries in Europe.
