All of the following were causes for American Imperialism EXCEPT for

A. To The Need for Raw Materials

B. Importance of Naval Power

C. Competition with European Powers

D. Fear of Soviet Influence

How was classical persia's extensive network of roads important to its civilization?

Is harry truman considered a hero or a tyrant for dropping the atomic bombs on hiroshima and nagasaki? (need a paragraph)

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.