Question 15 (4 points)
what difficulties were faced by the song dynasty? rg 182
select all that apply.
nomads invaded from the north
pennants overthrow the emperon
the grand canal flooded,
they did not have a large enough military to protect more and the north a
n omalebar
question 16

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.