请教一道GWD-5-Q3，有点不理解阿

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?

1. The number of television assemblers in Vernland has increased by at least as much as the number of television assemblers in Borodia has decreased.

2. Televisions assembled in Vernland have features that televisions assembled in Borodia do not have.

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

4. The number of televisions assembled annually in Vernland has increased significantly during the past three years.

5. The difference between the hourly wage of television assemblers in Vernland and the hourly wage of television assemblers in Borodia is likely to decrease in the next few years.

答案选c，不理解！谢谢！

OG的。V的装配一台时间为a，B的装配时间位b。a>b

B免税啦。。。。每年卖的机器数量不变。B装配工数量下降。

结论：B从V引进了更多的电视。

试想，如果B的装配效率提高。则可以用更少的人完成相同的工作。生产出相同数量的机器。

而假设正好是削除这个可能。