Which iconic beverage brand faced massive consumer backlash in 1985 after changing its formula and had to reintroduce its original product as 'Classic' just 79 days later?

In the ever-evolving world of pop culture, brands often undergo dramatic transformations to stay relevant with changing consumer preferences. Some rebranding efforts become legendary successes, while others become cautionary tales discussed in marketing classes. This trivia question tests your knowledge of one of the most infamous rebranding failures in pop culture history that caused massive consumer backlash and required a swift reversal.

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Coca-Cola
Pepsi
Dr Pepper
Mountain Dew