Which famous historical advertising slogan from 1926 led to a 55% increase in diamond sales within 3 years and fundamentally changed how Americans approached marriage proposals?

Before social media and digital marketing, companies relied on powerful slogans to build their brand identity. Throughout history, certain taglines have become so iconic that they transcended their products and became cultural touchstones. This trivia challenge explores one of the most influential advertising slogans from the early 20th century that helped shape modern marketing approaches. Test your knowledge of how historical advertising language has influenced consumer behavior across generations!

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"A Diamond is Forever" - De Beers
"Say It With Diamonds" - N.W. Ayer for De Beers
"Diamonds: As Eternal As Your Love" - Tiffany & Co.
"Two Months' Salary Shows How Much You Care" - De Beers