Hi!
I'm pretty sure the answer is either the first option or the third option. My money's on the first one.
There was conflict over resources and land between European countries and indigenous ethnic groups.
The 19th amendment gave women the right to vote in US elections. This law was passed in 1920.
Flappers were women during the 1920's who abandon tradition. Before this time, women were expected to wear long dresses similar to the ones worn in the Victorian era in Europe. Instead, flappers were dresses that were shorter (usually showed their ankles or knees). Along with this, flappers loved to listen to music, got short hair cuts (also called a bob cut), and partied in speakeasies.
During the 1920's, jazz exploded onto the scene thanks to the Harlem Renaissance. Thanks to musicians like Louis Armstrong and Duke Ellington, jazz music became one of the most popular types of music in the United States. This jazz music was played in several different venues. This include speakeasies and clubs devoted to jazz like the famous "Cotton Club."
The World war 1 has been documented as, World War, WWI, the War to End All Wars, and the Great War.