A similarity between the Red Scare of the 1920's and McCartyism in the 1950's was that during each period A. thousands of American citizens were expelled from the United States
B. the Communist Party gained many members in the United States
C. many government employees were convicted of giving secrets to the Soviet Union D. the civil liberties of American citizens were threatened

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.