Also, you can see this question as a %(proportion) VS#(number) type one.
The paradox here is that under the bad economic circumstance,the % is increasing, a phenomenal seems a good sign going against the adverse condition.
The key is the total # is decreasing. Bad go out, good reside.
NO 93
Premise: a specific case about TWO countries.
Conclusion: a general condition about every country.
What is the Gap? or what is the assumption?
There is an analogy in this question. The assumption is the different sets in the analogy are same in terms of conditions relating the conclusion.
A is an opposite choice, challenging the premise.
B is also an apposite choice,challenging the premise.
C is irrelevant.
D from two countries to every country, what should be hold unchanged?
Or you can negate the choice and you will find if, among all the countries, only two countries remain their friendly relationship, they will continue to trade with each other. Thus the conclusion is destroyed.
E is irrelevant.
BTW: When you ask a question, you'd better give out your own thought. Not just why C is right, why D is wrong. I have two reasons.
First, you can inspect your own thought when you write it out explicitly rather than keep it in your mind which is usually muddy and messy.
Second,CR is very personal thing at the detail level when it goes beyond the macro theoretical one. It is about your personal thought and your personal way to crack the question. For example, Irrelevance is obvious for some person but very obscure for others. Other people cannot know what is the exact problem of you, unless you write your mind out.