Which revolutionary retail innovation from the 1930s allowed consumers to shop for multiple products in one location and is credited with transforming the American shopping experience during the Great Depression?

Throughout history, certain product innovations have fundamentally transformed retail experiences and consumer behavior. These breakthrough products often reflect the socioeconomic conditions and technological capabilities of their era. Test your knowledge about pivotal moments in retail product innovation history that shaped how consumers interact with goods and services today.

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The supermarket (e.g., King Kullen, opened 1930)
The shopping mall (developed later in the 1950s)
Mail-order catalogs (popularized earlier in the 1890s)
Department store charge cards (became widespread in the 1940s-50s)