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

Brief Explanation:

In the early 1900s, radio was a new - emerging entertainment medium that played a crucial role in popularizing ragtime and jazz music by reaching a wide audience. Television became more prominent later, "talkies" were related to movies with sound and not the main medium for popularizing these music forms in the early 1900s, and opera is a different form of musical performance not associated with popularizing ragtime and jazz in that era.

Answer:

C. radio