Which retail innovation, first introduced by Clarence Saunders in 1916, revolutionized shopping by allowing customers to select their own merchandise?

The way we shop today seems natural, but the retail experience underwent a fundamental transformation in the early 20th century. Before this revolution, customers would hand shopping lists to clerks who would gather items for them. One innovative store owner changed everything by introducing a radical new concept that would forever alter how we interact with products. Test your knowledge about this pivotal moment in retail history that shaped modern shopping experiences worldwide.

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Piggly Wiggly self-service grocery store
Woolworth's price-marked merchandise system
Sears Roebuck mail-order catalog shopping
Marshall Field's department store browsing model