Which architectural retail innovation, first widely implemented in the 1950s, revolutionized product visibility and is credited with increasing average customer dwell time by over 25%?

The way retail spaces are designed has evolved dramatically with changing consumer behaviors and technological advances. Architects specializing in retail environments must balance aesthetic appeal, brand identity, customer flow, and sales optimization. This trivia question explores a significant architectural innovation that has transformed the retail landscape and influenced how products are marketed and sold in physical spaces.

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The 'racetrack' layout (forced pathway design)
The storefront display window system
The open floor plan with centralized checkout
The fully glazed/transparent storefront