Answer:
B. The Policy of Containment
Explanation:
Truman was worried that if Korea fell, the next country to fall would be Japan, which was very important for American trade. This was probably the most important reason for America's involvement in the war.
I believe what you're looking for is economics, but I could be wrong.
I believe the answer would be B. Some states don't collect income tax because every person in every state has to pay their taxes. Hope I helped!
