onsider the excerpt from "Music Gets Personal” and the excerpt’s central idea.

Then, technology took another big step forward. A group of experts got together. They called themselves the Moving Picture Experts Group. They found a way to make digital files smaller. They called those files MPEGs.

MPEGs led to MP3s. MP3s are very small files. You can put hundreds of them on one PMP. You can put enough songs on one PMP to last for weeks without repeats.

Central Idea: As technology advanced, music files could be stored in new ways.

What detail is most important to include in a summary of the excerpt?

Experts formed the Moving Picture Experts Group.
Experts named the digital files MPEGs.
People can put hundreds of MP3 files on a music player.
Music fans enjoy listening to songs without any repeats.