GWD5-Q3 求NN提供解题思路

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?

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

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

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.

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

   E.       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.

正确答案是C吗？为什么啊？跪谢！

since the number of televisions sold annually in Borodia has not changed and the number of television assemblers in Borodia has decreased,the author takes granted that the number of television assembled in Borodia is insufficient to cover the demand and hence Borodia must import television from Vernland. But there is a jump of concept, whether a drop in the number of television assemblers could lead to a commensurate decrease in output. the author assumes by filling out the gap between the number of television assemblers and the number of television assembled in Borodia. In choice C, if the average number of hours it takes a Borodian television assembler to assemble a television has decreased significantly ,that is , the output per worker of Borodia in certain time is much more than before, the evidence of a drop in the number of television assemblers is inadequate to draw the conclusion.