Peter the great fought the ottoman turks for the purpose of a. building st. petersburg. b. defining their common border with qing china. c. winning lands along the baltic sea. d. gaining a warm-water port on the black sea

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.