Which retail innovation, launched in 1916, fundamentally changed shopping by allowing customers to select their own products without clerk assistance for the first time?

Retail innovation has shaped how we shop throughout history. From humble beginnings to complex retail ecosystems, certain breakthroughs fundamentally transformed commerce and consumer culture. This trivia question explores a pivotal moment in retail history that changed shopping patterns forever and established practices we still see today. Test your knowledge of retail innovation's historical foundations!

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Piggly Wiggly self-service grocery store
Sears Roebuck mail-order catalog
Marshall Field's department store charge card
A&P economy grocery chain