What was the significance of The Armory Show held in 1913?

The Armory Show held in 1913 is significant primarily because it was a groundbreaking exhibition that introduced American audiences to modern art styles that were largely unknown in the United States at the time. The show showcased works by European artists such as Pablo Picasso, Henri Matisse, and Marcel Duchamp, among others, which represented a shift away from traditional artistic conventions towards more avant-garde approaches that included Impressionism, Cubism, and Fauvism.

This exhibition did not only present modern European art but also challenged American artists and audiences to reconsider their understanding of what art could be. The Armory Show played a pivotal role in sparking interest in modernism in America, influencing numerous artists and leading to the development of various movements such as Abstract Expressionism and other contemporary art practices.

While the other options touch on important art movements and topics, they do not accurately reflect the primary impact of The Armory Show. The event's emphasis on introducing modern art styles is what fundamentally changed the trajectory of American art history.