费费补充材料P214-第162题

yunerqin

Commentator:The theory of trade retaliation states that countries closed out of any of another country’s markets should also 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 the 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 any two countries ,at least one has some market closed to the other.

(e)        Countries close their markets to foreigners to protect domestic producers.

正确答案是(d)

想不通为什么，不知哪位能帮忙解释一下，谢谢！

yaoyao99

The theory is:
Step 1. when country A closes out some markets for country B => B should close out markets for country A
as a result
Step 2. A will close more markets for B => the cycle continues
final result
No country has any trade with another country

The condition here is there is both country always have available markets to close out (D).  Otherwise, when A closes out something, B will have nothing to close out and they will never get to step 2.

yunerqin

thanks for your kind explanation