单选题 Seven countries signed a treaty binding each of them to perform specified actions on a certain fixed date, with the actions of each conditional on simultaneous action taken by the other countries. Each country was also to notify the six other countries when it had completed its action.
The simultaneous-action provision of the treaty leaves open the possibility that

A、 the compliance date was subject to postponement, according to the terms of the treaty
B、 one of the countries might not be required to make any changes or take any steps in order to comply with the treaty, whereas all the other countries are so required
C、 each country might have a well-founded excuse, based on the provision, for its own lack of compliance
D、 the treaty specified that the signal for one of the countries to initiate action was notification by the other countries that they had completed action
E、 there was ambiguity with respect to the date after which all actions contemplated in the treaty are to be complete

【正确答案】 C

【答案解析】[解析] 本题也可归入“逻辑应用与技法”题型，但我们在本书第一篇第二章已指出：在对待问题目的类型上，要明白“运用之妙，存乎一心”的重要性。
conditional on upon sth. 依赖某事物的，含有条件的
well-founded 基础牢固的，有根据的