How did china's early civilization differ from other river valley civilizations?

select all correct answers.

china's civilization did not die out but continues today.

other civilizations were ruled by a single leader.

the people of ancient china relied on trade to acquire things they needed.

people in ancient china were cut off from others by geographic features.

the people in china worshipped only one god.

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.