Which retail innovation, first introduced in 1916, fundamentally changed shopping by allowing customers to select their own merchandise without clerk assistance?

Throughout history, retail innovations have transformed how we shop and consume products. From ancient marketplaces to digital storefronts, the evolution of retail has been marked by key innovations that revolutionized commerce. This poll tests your knowledge about one of the most significant retail format innovations that changed shopping habits forever and set the foundation for modern retail as we know it today.

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Piggly Wiggly self-service grocery store
Marshall Field's department store credit cards
Sears mail-order catalog home delivery
A&P economy grocery chain price standardization