American Revolution. a. Social Cause
b. Economical Cause
c. Political Cause
d. Intellectual Cause

Reformers worked to change schools by making them more:

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.

How did the industrial revolution give an advantage to industrialized european nations over non-industriallized nations?