Why was a compromise with spain to avoid war not possible in 1898?

Which factor was a major cause of the great depression of the 1930?

Which number shows the location of italy?

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.