How did mcculloch v maryland affect the separation of powers in the united states?

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.

Which event occurred in 1943 and to make the allied victory possible choose all answers that are correct

Describe the impact of the neolithic revolution on civilization