Which early 20th century advertising pioneer is credited with revolutionizing retail marketing by introducing the concept of 'unique selling proposition' (USP) and creating campaigns focused on product benefits rather than features?

Before digital marketing and social media campaigns, retail advertising underwent a revolutionary transformation that shaped how brands connect with consumers. This trivia question explores a pivotal moment in retail marketing history that changed how products were presented to the public and established practices we still see today. Test your knowledge about how modern advertising techniques emerged and transformed the retail landscape in the early 20th century.

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Rosser Reeves (creator of M&M's 'Melts in your mouth, not in your hand' campaign)
Edward Bernays (Sigmund Freud's nephew who applied psychology to marketing)
Helen Lansdowne Resor (first woman to create advertisements specifically for female consumers)
Claude Hopkins (pioneer of coupon-based promotions and test marketing)