U.S histroy help?? just need help with a essay topic?

i just cant decide on which ones to choose :/ can someone help me pick from either the Truman Doctrine, the Marshall Plan, the Restructuring of Japan, the Korean War, the Hungarian Revolution, or the Berlin Wall to write an essay on? and why you think i should pick that one and how the U.S. policy of containment affected the one major aspect of the Cold War