In what way was the empire of ghana different from the later empire of mali?

a. ghana was ruled by malinke leaders, and mali was ruled by soninke.

b. ghana was mostly animists, and mali had a muslim-following leadership.

c. ghana was patrilineal, and mali followed a matrilineal system

d. ghana was influenced by arab architecture, and mali was not.

Which of the following week is not characteristic of a nation-state? a. nationalism b. sovereignty c. a national identity c. numerous village kings

How do you imagine life would be without the invention of the typewriter? would computers have been invented?

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.