Final answer:
The shift of the art world's center from Paris to New York post-World War II was due to economic factors such as the rising American economy, cultural shifts like the emergence of Abstract Expressionism, and political changes brought on by European turmoil.
Step-by-step explanation:
Reasons for the Shift of Art Center from Paris to New York
After World War II, the art world witnessed a significant geographical and philosophical shift. This was largely influenced by various factors that led to New York becoming the epicenter of new art.
One economic factor was the influence of the American economy (c), which was on the rise, making the United States, particularly New York City, an attractive destination for artists.
In terms of cultural shifts, the emergence of Abstract Expressionism (a) and the formation of art movements like the New York School (d) played significant roles.
Politically, the turmoil in Europe and the rise of existentialist philosophy (b) contributed to artists seeking new horizons. These movements and philosophical ideas became the driving forces behind the change in the art world's center of gravity from Paris to New York.