Which best describes the standards required of foreign producers? Foreign producers have more stringent standards than domestic producers.
Foreign producers must meet the same standards as domestic producers.
Foreign producers must meet specific standards based on their origin.
Foreign producers do not use standards that harm consumers.

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.