Which brand slogan holds the Guinness World Record for being the longest continuously used advertising slogan in history, remaining virtually unchanged since its introduction?

In the world of marketing, some brand slogans have stood the test of time and set impressive records for longevity and recognition. These iconic phrases have become so deeply embedded in consumer consciousness that they've earned their place in marketing history. This trivia challenges you to identify which famous slogan holds the world record for being the longest continuously used advertising slogan without significant modification. Test your knowledge of these enduring marketing masterpieces!

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De Beers' "A Diamond is Forever" (1948)
Nike's "Just Do It" (1988)
Maxwell House's "Good to the Last Drop" (1915)
Coca-Cola's "The Pause That Refreshes" (1929)