Final answer:
American literature flourished with innovation and experimentation during the 'Roaring Twenties'.
Step-by-step explanation:
After World War I, American literature flourished with innovation and experimentation during the 'Roaring Twenties'. This period, also known as the Jazz Age, was characterized by significant social and cultural changes, which had a profound impact on literature. Writers like F. Scott Fitzgerald, Ernest Hemingway, and Sinclair Lewis emerged, depicting the disillusionment and social unrest of the time. They challenged traditional values and experimented with new narrative techniques, reflecting the general feeling of change and progress in the post-war era.