Which retail innovation, first introduced in 1916 by Clarence Saunders, revolutionized shopping by allowing customers to select their own merchandise rather than having clerks gather items for them?

The history of retail is filled with revolutionary innovations that transformed how we shop. From the earliest bazaars to today's digital marketplaces, retailers have continuously evolved their methods to better serve customers. One particular innovation in the early 20th century fundamentally changed the shopping experience and laid the groundwork for modern retail as we know it. Test your knowledge about this pivotal moment in retail history!

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The shopping mall
The self-service grocery store (Piggly Wiggly)
The department store catalog
The retail loyalty card