Answer:
Four prewar conflicts are:
Control of Balkan States
North Africa colonies
Alsace- Lorraine
The freeing of Italians from Austrian rule
Explanation:
The Balkans campaign, or Balkan theatre preworld war 1 conflict was fought between the central power of Austria-Hungary, Bulgaria, Germany and the Ottoman Empire on one side and the Allies, which included Serbia, Montenegro, France, the United Kingdom, Russia and Italy, and later Greece, on the other side.
A prewar conflict 1914, was Germany having four colonies: Togo, Kamerun (Cameroon), German Southwest Africa and German East Africa, where the armies of Britain and France fought with imperial German forces, ending the German colonial rule in Africa.
The attack to Austria-Hungary from Italy, along the Isonzo River and in the Trentino, was another prewar conflict.
Coup of 18–19 Brumaire, (November 9–10, 1799), coup d'état that overthrew the system of government under the Directory in France and substituted the Consulate, making way for the despotism of Napoleon Bonaparte. The event is often viewed as the effective end of the French Revolution.
If this is about Vietnam then the answer is C