求教一道prep逻辑题

Cutis

请教一下各位大仙，这道题选什么好呢，答案给的是C，可我怎么觉得A更合理些啊
19.    (27788-!-item-!-188;#058&003653)


With a record number of new companies starting up in Derderia and with previously established companies adding many jobs, a record number of new jobs were created last year in the Derderian economy.  This year, previously established companies will not be adding as many new jobs overall as such companies added last year.  Therefore, unless a record number of companies start up this year, Derderia will not break its record for new jobs created.

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

(A) Each year, new companies starting up create more new jobs overall than do previously established companies.
(B) Companies established last year will not add a greater number of jobs overall this year than they did last year.
(C) This year, the new companies starting up will not provide substantially more jobs per company than did new companies last year.
(D) This year, the overall number of jobs created by previously established companies will be less than the overall number of jobs lost at those companies.
(E) The number of jobs created in the Derderian economy last year was substantially larger than the number of jobs lost last year.

Cutis

谢谢啦，我忽略了一个地方，就是a record of new companies,这本身就暗含着今年新增的公司创造的就业岗位不如去年同期的多，因此今年新创立的公司数只有破纪录才能弥补这一空缺

Cutis

谢谢啦，我忽略了一个地方，就是a record of new companies,这本身就暗含着今年新增的公司创造的就业岗位不如去年同期的多，因此今年新创立的公司数只有破纪录才能弥补这一空缺

xn8510

个人理解如下：
本题的结论是：除非今年新增公司数目破纪录，否则，今年新增工作不会比去年多。

根据原文，可把新增工作的来源分为两类：老公司创造的和新公司创造的。对选项C取非：今年，每个新公司创造的新工作都多于去年每个新公司创造的新工作。那么，即使今年新增公司数目不破记录，新增工作的总数也很可能多于去年，原题的结论不成立。因此，选项C是正确的。。。