What was a characteristic of american companies in the 1920s?

Reread patrick henry’s quote about the continental congress. what change was taking place in how the colonists saw themselves?

Which describes what happened when anne hutchinson questioned the teachings of puritan leaders?

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.