Which of the following best characterizes the neolithic era?
a. the need for hunting and gathering
b. the development of permanent settlements
c. the discovery of fire
d. the development of stone tools

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.