What new behaviors showed that attitudes were changing during the 1920s?

1. America's population generally shifted from rural areas to more urban ones.

More than half of the nations population now lived in cities and towns.

2. Urban communities life was now unquestionably lively and stimulating. There were many things to see-museums, art exhibits, plays, athletic events, trade expositions, and the like.

3. New ideas in science were examined and often accepted. Of course this was the case in the cities more so than in the small towns. In small town America most people remained relevtivley conservative. (See Scopes Monkey Trial) People now tended to be judged on their accomplishments rather than on their social background.

I’m pretty sure that the answer is b.