Which Apple product launch in 2001 disrupted the music industry's traditional sales model and eventually led to the decline of physical CD sales?

The music industry has seen revolutionary product launches that have completely transformed how we consume music. This trivia question tests your knowledge about a pivotal moment in music retail history that changed the industry's business model forever. Can you identify the groundbreaking product that redefined music consumption in the early 2000s?

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iPod
iTunes Music Store
iMac G3
QuickTime Player