IN A FEW PARAGRAPHS SUMMARIZE THE WAR IN THE PACIFIC VS. JAPAN. DAHACHASE. CAN SOMEONE PLEASE HELP

Arguably one of the most important inventions of the 20th century was a) the transistor. b) air conditioning. c) the vacuum cleaner. d) radio broadcasting.

In an economic downturn, what can happen in countries that depend on high taxes to fund social programs?

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.