Which of the following was a big factor in the emergence of Modernism?

1. The Armory Show opened in New York: In February 1913, an art show opened in New York that featured the work of these modernists and other artists. The Armory Show was an art show in New York, held in 1913, which played a key role in introducing modernism to America., as it was known (due to its location at the 69th Regiment Armory), alternately scandalized and inspired its audience.

2. World War I ended: It wasn't until after the First World War that American modernism's second wave emerged.

3. The Industrial Revolution began: The Industrial Revolution caused major changes in the way the average person lived his or her life. As a result, modernist artists began to look for new means of expression. Writers of the time rejected traditional forms and styles of writing and adopted - even invented - new ones.

4. Manet painted Le déjeuner sur l'herb: Heradically challenged ideas of what was appropriate in terms of technique, theme, and subject matter.