Final answer:
European artist immigration, major art museum exhibits, and the adoption of international art ideas contributed to the influence of International Modernism in the US from the 1920s-1950s. These combined factors made New York a new hub for modern art and introduced American artists to key modernist movements and styles.
Step-by-step explanation:
The factors that facilitated the strong influence that International Modernism had on art and design in the US during the 1920s-1950s are multifaceted. One significant influence was the influx of European artists who immigrated to the US to escape the two World Wars. These artists started teaching and working within the country, thereby directly transferring their ideas and practices. Another key factor was the role of major art museums, such as the Museum of Modern Art (MOMA), in organizing exhibits of Modern Art and Design, which contributed to the dissemination of modernist aesthetics.
Additionally, US designers adopted various ideas, forms, and styles that originated in modern art and Europe, indicating a cultural exchange and the incorporation of international perspectives into American art. Movements such as Abstract Expressionism, and the influences of Cubism and Surrealism, have shaped American Modernism. This era saw New York City emerge as a new center for Western art, moving from Paris, which amplified the reach of modernist ideas. Moreover, the psychological theories that were central to the growth of American abstract expressionism reflected the changing social and political climate.
Therefore, the correct answer is 'All of the above', as these factors combined to create a fertile environment for International Modernism to flourish in the United States.