Which innovative packaging design feature, introduced in the early 1980s, revolutionized music retail by reducing theft and creating a standard size for music products in stores?

The packaging of music products has evolved dramatically over the decades, with some innovations changing how consumers interact with music entirely. From vinyl sleeves to digital downloads, packaging decisions have shaped the music retail experience and often reflected broader industry trends. This trivia question tests your knowledge about a significant packaging innovation that transformed the music retail landscape.

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The longbox - a 6x12 inch cardboard package that held CDs, making them harder to steal and matching the size of vinyl displays
The clamshell - a hinged plastic container with security sensors built into the spine of album packaging
The blister pack - a vacuum-formed plastic with cardboard backing that required scissors to open
The digipak - a cardboard folder with plastic disc tray that eliminated plastic jewel cases