Which candy company famously increased sales by adding more red M&Ms to their color mix after consumer research showed people believed red ones tasted better (despite all colors having identical flavor)?

Major food companies invest billions in marketing psychology to make their products irresistible. From strategic store placement to color psychology, these tactics influence our purchasing decisions in ways we often don't recognize. This trivia question explores how one famous candy brand leveraged consumer psychology to transform its market position through a clever visual marketing strategy that changed how we perceive this iconic treat.

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Mars, Inc. (M&M's manufacturer)
Hershey's (Reese's Pieces manufacturer)
Nestlé (Smarties manufacturer)
Ferrara Candy Company (Skittles manufacturer)