96 Commentator: The theory of trade retaliation states that countries closed out of any of another country's markets should close some of their own markets to the other country in order to pressure the other country to reopen its markets. If every country acted according to this theory, no country would trade with any other.

The commentator's argument relies on which of the following assumptions?

(A) No country actually acts according to the theory of trade retaliation.
(B) No country should block any of its markets to foreign trade.
(C) Trade disputes should be settled by international tribunal.
(D) For the two countries, at least one has some market closed to the other.
(E) Countries close their markets to foreigners to protect domestic producers.

OG explanation:

Argument construction
Situation: The theory of trade retaliation is explained as the action and reaction of closing markets between trading nations; no country would ever trade with another, the observation is offered, if every country acted according to the theory.

Reasoning: What assumption underlies this argument? What makes the commentator conclude that no country would be trading if the theory were operative? The commentator must perceive of some condition as a given here. The argument assumes an initial action, a country's closing of a market to a trading partner, that is followed by a reaction, the retaliatory closing of a market by that partner. In this unending pattern of action-reaction, at least one of the two countries must have a market closed to the other.

A Any one country may act according to the theory, but not every country.
B The argument assumes that countries do block markets to foreign trade.
C An international tribunal is not mentioned in the argument.
D Correct. This statement properly identifies the assumption required to create the never-ending action-reaction pattern.
E The argument does not discuss the protection of domestic trade.

The correct answer is D

 我的问题是，我看不懂题干的意思，我不是经济商科类背景的，哪位好心人能帮我解释一下这句话隐含的经济规律？

 我的问题是，我看不懂题干的意思，我不是经济商科类背景的，哪位好心人能帮我解释一下这句话隐含的经济规律？

The theory of trade retaliation states that countries closed out of any of another country's markets should close some of their own markets to the other country in order to pressure the other country to reopen its markets.

The theory of trade retaliation states that countries closed out of any of another country's markets should close some of their own markets to the other country in order to pressure the other country to reopen its markets.

我也没学过这东东, 试着翻易一下.

贸易报复的理论表明那些被关闭了出口市场的国家应该也关闭它的进口市场,为了向那些国家施加压力从而使其重新开放进口市场.

就是说:如国一个国家被人制裁不能出口了,那么它就会相应的也关闭它的进口市场也不进口那些国家的产品.就是一种报复行为.

关于这一题的选项都还是很容易排除的，但是我有个疑问是关于A选项OG的解释，

A       No country actually acts according to the theory of trade retaliation.

解释：Any one country may act according to the theory, but not every country.

这个解释是什么意思？题干不是已经说了If every country acted according to this theory, no country would trade with any other. 这个选项是直接与题干矛盾的，不明白它的解释有什么意义？？但是如果大胆假设A选项本来是说Every country actually acts according to the theory of trade retaliation.的话就MAKE SENSE了。。狂汗。。难道ETS把题出错了。。 请各位NN帮帮忙。。汗!!

My understanding is that as long as you know that choice A is the opposite of the argument, there is no need to study too much about why.  To me, CR is different from SC that as long as you understand how to get the correct answer, why bother to distract youself from the real feel of OG.