Which retail innovation, first introduced in the 1840s, revolutionized visual merchandising by allowing customers to see products through glass without handling them?

Before digital displays and elaborate store designs, visual merchandising had humble beginnings. The evolution of how products are presented to consumers has transformed dramatically over centuries, influencing purchasing decisions and shopping experiences. This trivia question explores a pivotal innovation in retail history that forever changed how stores display their merchandise and engage with customers.

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The department store display window pioneered by Aristide Boucicaut at Le Bon Marché
The counter-service model introduced by Frank Woolworth's five-and-dime stores
The catalog showroom concept created by Aaron Montgomery Ward
The self-service shopping floor layout developed by Clarence Saunders for Piggly Wiggly