What were some of the key challenges that Americans faced due to urbanization and what were some of the possible solutions to those challenges?

The rise of advertising in the 1920s. i am good with seeing how advertisements shape the roaring twenties and how it developed a new way of life through modern days. but i am not sure what the details of advertising in the 1920s were. if possible can you send me links (preferrably credential links) to sources that maybe show like the first company to start advertising through the radio, how advertising benefits (statistics graphs), etc.

What is the result of americans’ tradition of joining interest groups? a decline in political parties a large number of interest groups of all sizes a few large interest groups a large number of equally funded interest groups

What actions are the pope asking the university of oxford to take against wycliffe