What new form of entertainment helped to popularize ragtime and jazz in the early 1900s?

The emergence of radio in the early 1900s played a significant role in popularizing ragtime and Jazz Music. By broadcasting performances and recordings to a wide audience, radio introduced these genres to listeners across the country, transcending geographic boundaries. Additionally, the rise of dance halls and speakeasies during Prohibition provided venues where people could experience live jazz, further fueling its popularity. Together, these forms of entertainment helped to solidify ragtime and jazz as key elements of American culture.