GWD5-14

Why is this answer D?  Please explain, thanks

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Q14:

Political Advertisement:

Mayor Delmont’s critics complain about the jobs that were
lost in the city under Delmont’s leadership. 
Yet the fact is that not only were more jobs created than were
eliminated, but the average pay for these new jobs has been higher than the
average pay for jobs citywide every year since Delmont took office.  So there can be no question that throughout
Delmont’s tenure the average paycheck in this city has been getting steadily
bigger.

Which of the following, if true, most strengthens the
argument in the advertisement?

1. The
        average pay for jobs created in the city during the past three years was
        higher than the average pay for jobs created in the city earlier in Mayor
        Delmont’s tenure.
2. Average
        pay in the city was at a ten-year low when Mayor Delmont took office.
3. Some
        of the jobs created in the city during Mayor Delmont’s tenure have in the
        meantime been eliminated again.
4. The
        average pay for jobs eliminated in the city during Mayor Delmont’s tenure
        has been roughly equal every year to the average pay for jobs citywide.
5. The
        average pay for jobs in the city is currently higher than it is for jobs
        in the suburbs surrounding the city.

D的意思是D他取消的工作的工资和平均的一样多，那么可以支持结论说D任期时的工资比以前要高。

因为如果取消的工作的工作如果比以前多很多的话，就不支持原文