Which historic advertising slogan, first used in 1948, transformed De Beers' diamond business by convincing consumers that diamond engagement rings were a cultural necessity?

Advertising slogans have shaped consumer culture throughout history, with some becoming so iconic they've lasted for generations. This trivia question focuses on one of the most influential and longest-running advertising slogans in retail history, which helped transform a small company into a global powerhouse. Test your knowledge of how historic marketing decisions created lasting brand legacies that continue to influence retail strategies today.

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A Diamond is Forever
Diamonds Are a Girl's Best Friend
The Precious Gift of Love
Diamonds: As Eternal As Your Love