The Olympic Games helped to keep peace among the pugnacious states of the Greek world in that a sacred truce was proclaimed during the festival's month.
(A)world in that a sacred truce was proclaimed during the festival's month
(B)world, proclaiming a sacred truce during the festival's month
(C)world when they proclaimed a sacred truce for the festival month
(D)world, for a sacred truce was proclaimed during the month of the festival
(E)world by proclamation of a sacred truce that was for the month of the festival
题目分析：A读起来还凑合，留着。B用逗号后面加proclaiming，我不知道这个动词是谁干的，干掉。C用when表明划线外的句子和划线内是时间关系，这个逻辑关系不对，杀。D读起来也还凑合，留着。E中的that was for 很别扭，干掉。A和D进行比较，一个用in that，一个用for，显然意思相同的情况下for更高效一些。
