Which retail innovation, first introduced in 1916, fundamentally changed how consumers shopped by allowing them to select their own products without clerk assistance?

The retail landscape has evolved dramatically throughout history, with innovations that forever changed how products reach consumers. This trivia question explores a pivotal moment in retail history that transformed the shopping experience and revolutionized product accessibility for average consumers. Test your knowledge about this significant retail innovation that laid the groundwork for modern shopping experiences!

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Piggly Wiggly's self-service grocery store model
Sears Roebuck's mail-order catalog system
F.W. Woolworth's fixed-price department store
A&P's grocery chain standardization model