Which retail innovation, first implemented in 1916 by Clarence Saunders, allowed customers to select their own merchandise without clerk assistance and is considered the birth of modern self-service retail?

Test your knowledge about a pivotal moment in retail history that transformed how consumers interact with products. This innovation fundamentally changed shopping behavior and set the foundation for modern retail experiences we take for granted today. The correct answer reveals a retail concept that revolutionized consumer culture and product accessibility in the early 20th century.

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Piggly Wiggly (the first true self-service grocery store)
Marshall Field's 'Bargain Basement' (the first discount department store section)
Woolworth's 'Five and Dime' (the first fixed-price retail model)
Sears Roebuck's 'Catalog Store' (the first retail-warehouse hybrid)