Which innovative music retail digital transformation strategy first introduced the concept of '30-second song previews' that became an industry standard for online music stores?

The music retail landscape has dramatically evolved over the past decades, with digital transformation revolutionizing how consumers discover, purchase, and experience music products. This trivia tests your knowledge about a pivotal moment in music retail history that changed the industry forever and set new standards for digital transformation in retail.

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Apple's iTunes Store in 2003, allowing customers to sample songs before purchase
Amazon's MP3 Store in 2007, featuring the 'Listen Before You Buy' campaign
Napster's legal relaunch in 2006, implementing preview functionality to promote legal music consumption
Best Buy's digital kiosks in 1999, allowing in-store customers to sample tracks from CDs