The U.S. used every form of media to promote propaganda, including radios, posters, leaflets, comic books, movies, magazines, newspapers.
I truly want to say A is the answer , B isn't anything I believe because of the gold rush.
I would suggest you start by matching countries to the cities you recognize. For example, Rome is in Italy, which means that "Italy" is N. If you are unsure about others, I'm sure you can google a map of Europe and that will help you fill out the rest :)
They maintained their own identities instead of "melting together" like described in the melting pot.
