Which of these candy products was first launched as a limited 'fan-requested revival' before becoming a permanent offering due to overwhelming consumer demand?

In the competitive world of food innovation, product launches can make or break a brand's trajectory. This poll tests your knowledge of one of the most significant confectionery product launches of the 21st century that changed how a major company approached its market strategy and international expansion. The launch featured groundbreaking marketing techniques and challenged traditional distribution models in the candy industry.

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Crispy M&M's (reintroduced in 2015 after being discontinued in 2005)
Hershey's Gold (caramelized creme with peanuts and pretzels)
Reese's Pieces Peanut Butter Cups (hybrid product)
KitKat Green Tea Matcha (international flavor brought to Western markets)