Which action illustrates government participation in an international organization?

select one:
a. the united states sends a delegate to sit on the united nations (un) security council.
b. japan conducts a study on the pros and cons of working with the world trade organization (wto).
c. ukraine debates whether to seek membership in the north atlantic treaty organization (nato).
d. france offers courses on the history of the united nations children's fund (unicef) in each of its public schools.