Answer:
A. It is evaluated to see if it helped address an issue.
Explanation:
I think you would need to tell both leaders to explain their problems then let the other world leaders put their mouths in.
The answer to complete the diagram is C.
I believe the answer you are looking for is Tributary.
Answer: nationalists: led by Chiang Kai-shek, supported by the US, more popular in wealthy cities
Communists: opposed Chiang Kai-shek, had the more effective army, supported by the USSR, More popular among poor farmers
Explanation: 100% on edge