what new form of entertainment helped to popularize ragtime and jazz in the early 1900s?\ntelevision\n“talkie…

Brief Explanations:

In the early 1900s, radio emerged as a new form of entertainment. It had a wide - reaching audience and was able to broadcast ragtime and jazz music to many people. Television became popular later, "talkies" mainly focused on movies with sound and not the main medium for popularizing these music forms in the early 1900s, and opera is a different and more traditional form of performance.

Answer:

C. radio