Which retail innovation, introduced in 1916 by Clarence Saunders, revolutionized customer experience by allowing shoppers to select their own merchandise rather than requesting items from clerks behind counters?

Test your knowledge about one of the most significant innovations in retail history that transformed how consumers shopped and fundamentally changed the customer experience forever. This development from the early 20th century laid the groundwork for modern retail environments and shopping behaviors we take for granted today.

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The self-service grocery store (Piggly Wiggly)
The department store credit card (Filene's)
The shopping mall concept (Highland Park Village)
The mail-order catalog system (Montgomery Ward)