What were the benefits and drawbacks of having a railroad run through your city in the 1800s?

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 kingdom once merged with egypt? a. nubiab. bantuc. phoeniciad. babylon

What are some incentives that parties have to carry out their campaign promises?