Before Postmodernism the authors that made up the literary canon in the United States were mostly white men.
This literary movement called Modernism (or modernist literature) had a non-traditional style of verse and poetry. The writers from that time felt traditional poetry was outdated, and that new forms of expression and representation had to be done to express new sensibilities and beliefs.
The Answer is A. Democracy
One very negative consequence of increased feelings of nationalism after WWI was the rise of fascism or so-called national socialism in countries like Germany and Italy. These governments appealed to nationalism and blamed such groups as the Jewish people for their economic problems in the late 20's and early 30's and also believed they had the right to invade and control other countries.