Answer;
Radio networks
Explanation;
-Magazines were america s only national medium from the 1890s until the 1920s when radio networks was/were established.
-Radio network became an accepted commercial medium during the 1920s. Initially many thought it was too intrusive a medium to allow advertising, as it entered people’s homes by the end of the decade, advertising had become an integral aspect of programming.
Answer:
what is the question? ....
Answer:
the size of the atlantic slave trade dramatically changed african societies. the slave trade led to the long-term impoverishment of west africa. it was profitable, so it also sprouted more millionares per capita in the mississippi river valley. america's southern states had become the economic engine of the burgeoning nation.
Explanation:
Not a history expert my guess would be the last one. Riot
It helped create the assembly line which created Ford Mobile cars.
please vote my answer brainliest. thanks!
