Which music packaging innovation was specifically created to combat the rise in CD theft from retail stores in the 1990s?

The way we consume music has dramatically changed over decades, and with it, the packaging of music products has evolved significantly. From elaborate vinyl album covers to minimalist digital interfaces, music packaging tells a story about both technology and artistry. This trivia question explores a pivotal moment in music packaging innovation that changed consumer behavior and industry standards. Test your knowledge about the evolution of how we experience music products!

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The longbox (the 6x12 inch cardboard package that CDs were originally sold in)
The Digipak (cardboard-based packaging as an alternative to jewel cases)
The PMRC Parental Advisory label
The oversized anti-theft plastic keeper case (requiring special tools to open)