Which advertising slogan holds the Guinness World Record for the longest continuously used slogan in advertising history, having been in use since 1948?

The Guinness World Records has recognized numerous marketing achievements over the years, including legendary advertising campaigns and slogans that broke records for effectiveness, longevity, and cultural impact. Test your knowledge about advertising slogans that made history by setting various world records in the marketing industry.

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A Diamond is Forever (De Beers)
Just Do It (Nike)
I'm Lovin' It (McDonald's)
Melts in Your Mouth, Not in Your Hands (M&M's)