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

Retail has evolved dramatically throughout history, with innovations that forever changed how consumers shop. The 19th and 20th centuries brought revolutionary concepts that laid the foundation for today's retail landscape. Test your knowledge about a pivotal innovation that transformed retail history and set the stage for modern shopping experiences. This historical retail breakthrough changed consumer expectations and business models forever.

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Self-service grocery shopping (Piggly Wiggly's innovation)
Department store model (Bon Marché's innovation)
Mail-order catalog shopping (Sears Roebuck's innovation)
Fixed price tags (Macy's innovation)