Answer:
B. Reciprocity.
Explanation:
Reciprocity refers to the act of <em>exchanging values or things </em>in which both parties are mutually benefited.
This works as well for privileges provided by organizations, which can be seen in the example by the World Trade Organization. In this case we can see that one government's concessions are met by other governments, thus providing mutual benefits for all.
Revolutionary movement
It is a specific type of social movement dedicated to carrying out a revolution. Charles Tilly defines it as "a social movement advancing exclusive competing claims to control of the state, or some segment of it".
The answer is true. The US didn't have any major wars that needed extra soldiers
