28 How did European competition for colonies affect Africa?
A- The division of Africa by European countries stopped the spread of Islam.
B- Competition ended the West African and East African slave trades.
C- Countries were created without regard for traditional ethnic groupings.
D- European colonies treated African colonies with respect.

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.

Me asap i will mark you as brilliant

Why did the us military stop the dakota uprising ?