What new form of entertainment helped to popularize ragtime and jazz in the early 1900s was it the radio or opera?

The new form of entertainment that helped to popularize ragtime and jazz in the early 1900s was the radio. With the advent of radio broadcasting, these musical genres reached a wider audience, allowing people to listen to and enjoy them in their homes. Although Opera was popular during this time, it did not have the same impact on the spread of ragtime and jazz as radio did.