Read the excerpt from "Music Gets Personal.” Radios had to be made and sold. Radio stations had to be built, too. All of this took more time. Finally, in the 1920s, music recording and radio came together. People listened to music in their homes. They bought record players. They listened to music on the radio, too.

What is the best summary of this excerpt?

Many people held jobs making and selling radios and building radio stations and record players.
Families enjoyed listening to music and other shows that were broadcast on the radio.
In the 1920s people became interested in purchasing records so they could play them on their record players.
Radio created a music industry, and by the 1920s people began enjoying music at home.