Pre-Test: The Internet music revolution began with the development of Multiple ChoiceMP3 compression.open-source software.streaming technology.broadband.

Breakdown of the Problem

1. The question is a multiple-choice format asking for the key factor that began the Internet music revolution.
2. It provides four options: MP3 compression, open-source software, streaming technology, and broadband.

Relevant Concepts

• MP3 Compression: This technology allowed for smaller file sizes, facilitating quicker downloads and streaming.
• Open-source Software: While it greatly contributed to technology distribution, it is not solely responsible for music distribution.
• Streaming Technology: This allows real-time delivery of music over the Internet, but it developed after the initial revolution.
• Broadband: Increased internet speed enabled better streaming and downloads but was dependent on earlier technologies.

Analysis and Detail

• MP3 compression played a crucial role in making music files manageable online, enabling users to download and share songs efficiently.
• While other options contributed to the evolution of music delivery over the Internet, the MP3 format was fundamental in making music widely accessible.

Verify and Summarize

Upon analyzing the impact of each option, it is clear that MP3 compression directly enabled the Internet music revolution, as it was the first widely adopted format that allowed users to easily share and download music.

Final Answer

MP3 compression.