Which of these was a result of America’s participation in world war ll

A) both women and African Americans won new job opportunities after the war

B) the U. S. loved to a more isolationist position and focused primarily on domestic issues

C) The U. S. owned large sets to England and the Soviet Union for war materials and supplies

D) American involvement resulted in the unconditional surrender of Germany Japan and the Soviet Union

On the graph, the bottom horizontal line represents

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

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.