Which retail innovation, introduced in the 1850s, revolutionized shopping by allowing customers to browse merchandise freely without requiring assistance from clerks?

The history of retail has seen remarkable innovations that transformed how people shop. From small family-owned shops to massive department stores and online marketplaces, retail has continuously evolved. This poll tests your knowledge about a pivotal innovation that changed the shopping landscape forever and set the foundation for modern retail experiences we enjoy today.

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Self-service shopping carts
Department stores with fixed pricing
Mail-order catalogs with home delivery
Automated checkout systems