America’s involvement in vietnam had its root in what

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.

how do you know that

explanation:

the correct answer is ) possibility.

demonstrating opportunity cost is done through production possibility.

the opportunity cost can be demonstrated using the production possibility frontier or curve. this graphic shows the total number of possibilities for two products when we have the resources needed and used in an efficient manner. the main resources could be money, labor, and technology. the curve shows that the production of one good increases when the production of the othe