Which retail innovation did Clarence Saunders introduce in 1916 that revolutionized shopping and is considered the precursor to modern supermarkets?

The landscape of retail has been shaped by visionary entrepreneurs who transformed how we shop. From humble beginnings to global empires, retail giants have pioneered innovations that we now take for granted. This trivia question explores a pivotal moment in retail history that changed consumer culture forever. Test your knowledge about the historical foundations of today's retail environment!

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Piggly Wiggly - the first self-service grocery store where customers could select their own items
The Bargain Basement - the first discount department store section that sold items at reduced prices
The Shopping Cart - a wheeled basket that allowed customers to collect multiple items while browsing
The Loyalty Card - a paper punch card that rewarded repeat customers with discounts after multiple purchases