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Radio programs.
One example would be <em>Lux Radio Theater, </em>sponsored by Lux, a brand of soap. The <em>Jack Benny Show </em>featured ads from its sponsor, Jell-O. Advertising agencies worked to target sponsorship and ads at the target audience of the programs.
Television, by the way, was just beginning in the late 1920s and didn't really become a dominant media until after World War II.
By forming trade blocs United States and other nations primarily cooperate economically
This is the right answers here James Monroe
Robert Livingston .
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A republic. It later became a dictatorship, but it was founded a republic.