What is the purpose of the system of checks and balances? Group of answer choices

to make it difficult to amend the Constitution

to list the responsibilities of elected officials

to share power between state and national governments

to prevent any one branch from becoming too powerful

If the rights to intellectual property are not sold or given away who owns the intellectual property

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.

As american population grew between 1820 and 1850, the percentage of americans living on farms also grew. a.true b.false