In 1985, which controversial product decision by Coca-Cola was reversed after just 79 days due to massive consumer backlash?

The 1980s 'Cola Wars' between Coca-Cola and Pepsi led to one of the most infamous product decisions in retail history. This period demonstrated how consumer loyalty, market research, and brand identity can dramatically impact a company's fortunes. Test your knowledge of this pivotal moment in consumer product history that forever changed how companies approach product reformulations and brand loyalty.

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Introducing New Coke and discontinuing the original formula
Launching Diet Coke to compete with Diet Pepsi
Switching from glass bottles to aluminum cans as their primary packaging
Removing cocaine as an ingredient from their original formula