Will mark brainliest !! What was the most historically significant change or development that occurred in the U. S. during the 1920s? Why?

The 1920s was a decade of profound social changes. The most obvious signs of change were the rise of a consumer-oriented economy and of mass entertainment, which helped to bring about a "revolution in morals and manners." Sexual mores, gender roles, hair styles, and dress all changed profoundly during the 1920s.

Explanation:

I don't know the exact answer but that's what I put

harding's opponent in the 1920 election was ohio governor and newspaperman james m. cox, who had won the democratic nomination in a 44-ballot convention battle. harding rejected the progressive ideology of the wilson administration in favor of the laissez-faire approach of the mckinley administration.