What was the date of the end of WWII?

Explain how agriculture and textile factories impacted the economic development of south carolina?

What refers to the division of power among the three branches of government

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.