GWD3-3一直没搞明白

GWD3-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 droip 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.

题目意思不太清楚，整个逻辑图也没搞明白，谢谢拉

题目意思

V装配电视机的平均用时一直比B的低（效率比B高）。B从3年前就解除了对V的关税壁垒，且电视机的销售量在B国没有变化。

然而，统计显示，B电视机装配工的人数下降了。结论：电视机的进口增加。

思路：电视机销售量=B装配的+从V进口的。而决定B年装配量的因素包括，装配效率和工人人数。

题目说，销售量不变，工人人数下降，于是推出结论：V进口增加。隐含的意思是B装配量下降。但他没有考虑到，工人人数下降，而工作效率提升的话，B的装配量还是不变，甚至可能增加。因而，结论被削弱。