What were american motives for waging the war against mexico

I’m annoyed but glad that my history teacher left and quit her job as a teacher to become a flight attendant

Which scenario is not an example of one of the primary motivations for bias in media coverage

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.