Which revolutionary theater design innovation, first widely adopted on Broadway in the 1920s, eliminated the need for support columns that obstructed audience views?

The performing arts world has seen numerous innovations in theater design that have transformed the audience experience. From ancient amphitheaters to modern Broadway houses, the physical layout of performance spaces directly impacts both artists and audiences. This poll tests your knowledge of a pivotal product design innovation that revolutionized the Broadway theater experience in the early 20th century and continues to influence performing arts venues worldwide.

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The cantilever system for balcony support
The orchestra pit sunken below stage level
The raked auditorium floor design
The proscenium arch stage configuration