Who was the first president? (Free points)

Why did the collapse of the soviet union and the power vacuum in the balkans lead to bosnian genocide?

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.

What did hiram rhodes revels argue for in the senate