He within the united nations exists to prevent military conflicts between nations. the widespread devastation that world war ii caused prompted world leaders to create this un division, whose main purpose is to prevent war. the united states is member of the security council.

You seem to be answering your own question within the sentenced you provided.  You are describing the United Nations Security Council.

Let me give you a little more detail about the UN Security Council:

The Security Council of the United Nations is responsible for the maintenance of international peace and security.  It is the only group or agency within the UN that can make decisions which are binding on all members of the United Nations.

The Security Council has the authority to send peacekeeping forces into conflict zones and to impose sanctions on member states of the UN that are deemed to be acting against the cause of peace.

The Security Council also approves new member states of the UN and plays a role in the election of judges to the International Court of Justice.

the correct answer is “opportunity cost”. opportunity cost is what a company misses out because it decided in one option over another one. in this case, the company decided to invest in building a factory so it gave up another possible benefit or profit in order to achieve success with the factory.  

trade-off is not the correct answer since it is a situation in which you accept losing something in return for benefits in other areas.

and finally, consequence is a general term used to accept what it comes when you make a decision. it can be a positive or negative consequence depending if the decision you took was the correct one.  

your answer would be just capitalism.