求助一道未被讨论过的ＧＷＤ题！谢谢

GWD-8-Q31: GWD-2-12’

Which of the following most logically completes the argument?

Yorco and Zortech are two corporations that employ large numbers of full-time workers who are paid by the hour.  Publicly available records indicate that Yorco employs roughly the same number of such hourly wage workers as Zortech does but spends a far higher total sum per year on wages for such workers.  Therefore, hourly wages must be higher, on average, at Yorco than at Zortech, since _____.

1. Zortech spends a higher total sum per year than Yorco does to provide its hourly wage workers with benefits other than wages

2. the work performed by hourly wage workers at Zortech does not require a significantly higher level of skill than the work performed by hourly wage workers at Yorco does

3. the proportion of all company employees who are hourly wage workers is significantly greater at Yorco than it is at Zortech

4. overtime work, which is paid at a substantially higher rate than work done during the regular work week, is rare at both Yorco and Zortech

5. the highest hourly wages paid at Yorco are higher than the highest hourly wages paid at Zortech

答案是：Ｄ实在是不明白如何得出

我选Ｂ

谢谢ＮＮ解答

Yorco and Zortech are two corporations that employ large numbers of full-time workers who are paid by the hour.  Publicly available records indicate that Yorco employs roughly the same number of such hourly wage workers as Zortech does but spends a far higher total sum per year on wages for such workers.  Therefore, hourly wages must be higher, on average, at Yorco than at Zortech, since _____.

1. Zortech spends a higher total sum per year than Yorco does to provide its hourly wage workers with benefits other than wages  削弱

2. the work performed by hourly wage workers at Zortech does not require a significantly higher level of skill than the work performed by hourly wage workers at Yorco does 文中么没有提到skill，即使对也有削弱的嫌疑，提供了Y公司的wage实际上不高的原因

3. the proportion of all company employees who are hourly wage workers is significantly greater at Yorco than it is at Zortech 也有削弱的嫌疑，提出比较的基础不一样

4. overtime work, which is paid at a substantially higher rate than work done during the regular work week, is rare at both Yorco and Zortech 说明比较的基础一样，不是加班导致了工资的提高

5. the highest hourly wages paid at Yorco are higher than the highest hourly wages paid at Zortech  无关，涉及的是average wage.

我也是刚起步，只是提一下自己的看法，希望多多切磋。谢谢！

我想楼主在看到“dose not require...high level of skill"的时候已经把它等同于z工人的工作时间<=Y工人的工作时间，但是1。题干本身没有提到任何和skill有关的东西”；2。即使假设B的叙述正确，我们要得到的结论是wage 和work hours的关系，也不能从skill的高低分别上得出结论，因为提干没有提到skill和这两者的联系；而且，high level of skill往往等同于更少的work hrs instead of more hours;

谢谢楼上这位~~~