这道题太纠结了，求大牛指导！

patriciasonghan

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?

• AEach year, new companies starting up create more new jobs overall than do previously established companies.
• BCompanies established last year will not add a greater number of jobs overall this year than they did last year.
• CThis year, the new companies starting up will not provide substantially more jobs per company than did new companies last year.
• DThis year, the overall number of jobs created by previously established companies will be less than the overall number of jobs lost at those companies.
• EThe number of jobs created in the Derderian economy last year was substantially larger than the number of jobs lost last year.
  

正确答案 C


麻烦用简洁易懂的方法解释一下吧。谢啦，我选的B。

soulwangh

Negate B，and the conclusion still has opportunities  to be valid.

companies established last year --new jobs created last year
companies established this year --new jobs created this year

premise ： number of companies established last year > that of companies established this year 、
conclusion： new jobs created last year > new jobs created this year