what is the primary way that the United States deals spread through the world?

a. Many people live in areas controlled by the American military and try to assimilate.
b. Other nations observe the success of American democracy, and institute a smaller one.
c. All international organizations promote American culture and values in their member states.
d. Many people from the United States, immigrant to other countries to teach others, their culture and ideals.

b. Other nations observe the success of American democracy, and institute a smaller one.