Who was considered a mulatto?

a. a person with indentured servants as parents

b. a person with parents of different races

c. a person with two white parents

d. a person with immigrant parents

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 isolationism affect foreign policy?

What is a human capital and what is one important way you can invest in your own human capital?