Which retail innovation, introduced in the early 20th century, fundamentally changed shopping by allowing customers to select their own merchandise without clerk assistance for the first time?

Before the era of online shopping and big box stores, retail underwent revolutionary changes that shaped how we shop today. This trivia question explores a pivotal moment in retail history that transformed the customer experience and established new paradigms for product accessibility and merchandising. Test your knowledge about retail innovations that changed the course of commerce!

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The department store concept introduced by Bon Marché in Paris
Self-service grocery shopping pioneered by Piggly Wiggly in 1916
Mail-order catalogs popularized by Montgomery Ward and Sears
The introduction of shopping carts by Sylvan Goldman in 1937