Final answer:
American modern art in the 1920s was aimed at exploring new forms of artistic expression, moving away from traditional, realistic styles to embrace abstract and emotional content.
Step-by-step explanation:
Much of American modern art in the 1920s was surrealist or expressionist because it was trying C. Explore new forms of artistic expression. This era marked a departure from traditional, realistic approaches to art, previously focused on the clear reproduction of nature and recognizable subjects. As the world experienced fragmentation and change, artists sought to innovate and experiment with abstraction, color, line, and dimension. New communication technologies and the migration of European artists to the United States contributed to a cultural and artistic exchange that deeply influenced American Modernism. Additionally, movements like Abstract Expressionism focused on emotions, the unconscious, and individual freedom - subject matter that traditionally figurative art had not addressed as directly or abstractly.