According to the declaration of independence, when should the people have the right to change their government ?

How did inovations in manufacturing lead to improvments in transportation?

Explain the strengths of the articles of confederation and how people reacted to this document. ! ^^^ 10 points

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.