What were the geographic advantages of constantinople

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.

How does fortas defend the majority decision that free speech in school is constitutionally protected

Think local—how is the lawmaking process at a local level different from the state or federal government? use complete sentences.