Answer:
Technological developments not only provided African Americans with more leisure times, but it helped to popularize Jazz Music which was dominated by African Americans in the 1920s
Step-by-step explanation:
The roaring 20s saw many technologies become popular among the general population. This included the radio, cinema and recorded music.
At the time, Jazz music was new genre that originated in New Orleans. It was a local music genre that was played in clubs, homes and enjoyed among the community.
However, with the advent of technology, there was an emergence of Jazz musicians who were popular all over the country. The rise and influence of Jazz music is synonymous with the 1920's and one the era's most recognizable cultural aspects.