Which historical innovation in the 1920s revolutionized retail advertising by introducing psychological appeals rather than just product features?

The advertising techniques we see today have deep historical roots! Throughout history, retailers have evolved their approaches to capture consumer attention and build brand loyalty. This poll tests your knowledge about a pivotal moment in retail advertising history that fundamentally changed how products were marketed and how consumer psychology was leveraged. Understanding these historical developments gives valuable context to modern marketing strategies and the evolution of consumer-brand relationships.

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Edward Bernays' 'engineering of consent' campaigns that linked products to emotional desires and social aspirations
Thomas Edison's invention of electric billboards that allowed for nighttime advertising displays
Henry Ford's newspaper campaigns emphasizing the technical specifications of the Model T
Sears Roebuck's detailed mail-order catalog system that highlighted product comparisons