GWD-TN3 第三题 看不懂

GWD5-Q3:

The average hourly wage of television assemblers in Vernland has long been significantly lower than that in neighboring Borodia.  Since Borodia dropped all tariffs on Vernlandian televisions three years ago, the number of televisions sold annually in Borodia has not changed.  However, recent statistics show a drop in the number of television assemblers in Borodia.  Therefore, updated trade statistics will probably indicate that the number of televisions Borodia imports annually from Vernland has increased.

Which of the following is an assumption on which the argument depends?

答案是：

C.    The average number of hours it takes a Borodian television assembler to assemble a television has not decreased significantly during the past three years.

求解释。另外 TELEVISION ASSEMBLER是啥意思？

同求

Television Assembler就是组装电视机的工人

如果题中的DROP换成SHORTAGE，就好理解了

不知道是不是这样

答案选C 对C取反工人平均装配时间减少了 说明他们的效率提高了 也就意味着并不需要那么多的人了， 照样能生产那么多的电视机。                    所以削弱推出结论所说 因为总数没变肯定是进口增多了 这个是他因削弱