Which music e-commerce platform innovation, launched in 2003, pioneered the legal digital music retail model that permanently transformed the industry's supply chain?

The music industry has undergone massive digital transformation in recent decades, completely changing how music is produced, distributed, and consumed. From physical records to streaming platforms, the supply chain and retail systems have evolved dramatically. This poll tests your knowledge about a significant innovation that revolutionized digital music distribution and retail.

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• Apple's iTunes Store
• Amazon MP3 Store
• Microsoft Zune Marketplace
• Spotify Premium

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