Question

what three innovations played a roll in creating vast changes in American society during the Roaring Twenties

Answer 1

Three innovations  that played a roll in creating vast changes in American society during the Roaring Twenties were:  

1- Electric Washing Machine: as many other electric apliances made the lives of many housewives and women much easier.

2- Electric refrigerator and freezers

3- Automibile: model T changed the industry of automobile and now they were used daily life issues: shopping, going to school, travelling. A model affordable for middle class families

Answer 2

Assembly-line production for goods, as were improved oil refineries. Transportation played a role, like the interstate highway.