One of the important decisions at the Yalta Conference was ______.
A、the allied landing at Normandy
B、the setting-up of a world organization, the United Nations, to manage peace and security after the war
C、coordinated efforts in war against Japan
D、None of the above
【正确答案】：B
【题目解析】：本题考查雅尔塔会议。雅尔塔会议的重要决定之一是建立一个世界组织—联合国，以管理战后的和平与安全。
