Which retail innovation, first widely implemented in the 1910s-1920s, revolutionized shopping by allowing customers to select their own merchandise without clerk assistance?

Test your knowledge about a pivotal moment in retail history that forever changed how consumers shop! In the early 20th century, a revolutionary retail concept emerged that would transform shopping from an assisted experience to one where customers could browse freely. This innovation fundamentally altered consumer behavior, store layouts, and retail strategies worldwide, setting the foundation for the modern shopping experience we know today.

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Self-service shopping (the modern supermarket concept)
Mail-order catalogs with home delivery
Department store with multiple specialized sections
Installment payment plans for larger purchases