Please please please help!!

What development led the soviet union to establish the warsaw pact? the soviets gained control over satellite countries. west germany joined nato. the allied powers grew weaker. the berlin wall was erected between east and west germ

Mayan people were known for participating in which of the following activities? road construction stargazing storytelling quipu weaving

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.