E because I did the test and got it right
A dispute between President Harry S. Truman and GeneralDouglas MacArthur in 1951, during the Korean War. MacArthur, who commanded the troops of the United Nations, wanted to use American air power to attack the People's Republic of China.
The answer is B, because the Song would make all government candidates undergo the civil service exam. Only if they passed would they be able to become part of the bureaucracy.
Domestic Tranquility means that there is peace, and no fighting/issues going on where you are living. It can have two different meanings though. It could also mean peace between the different states of a country. :) Hope I helped! For further details, I'd look into Google.