I Believe The Answer Is C.
The answer would be Trade bloc
So there is a circular flow of income in between two sectors – household sector and firm sector. This circular flow of money will continue indefinitely. In this way the economy functions. But, it is a fact that this flow of money income will not always be same.
America's involvement in Vietnam was deeply rooted in its policy of containment, which evolved out of the domino theory wherein the US needed to work to stop the spread of communism or communism would take over the world.
