Answer
There were 2 sides fighting in the Vietnam War. One of them was the American Armed Forces which fought against the Vietcong forces which were supported by the Soviet Union during the cold war between the United States and Soviet Union.
I believe its the second one.
The furthest destination that American silver was known to travel during 16th and 17th centuries was China!
Given the situation above regarding the reports made by an interest group about the poor performance of an executive branch agency, this is considered as an informal example of Checks and Balances political system. The answer to this is the third option. Hope this helps.