all of the choices!!!! hope this helps
By forming trade blocs United States and other nations primarily cooperate economically
Many people believe the United States should of helped Germany after World War One. After WW1 the Treaty of Versailles created a great depression in Germany, because of the aggressive reparations. Many historians believe that the end of WW1 caused World War 2.
C. A university designs a new building to ensure that astronomers will be able to easily observe the night sky