109.Correctly measuring the productivity of service workers is complex. Consider, for example, postal workers: they are often said to be more productive if more letters are delivered per postal worker. But is this really true? What if more letters are lost or delayed per worker at the same time that more are delivered?
The objection implied above to the productivity measure described is based on doubts about the truth of which of the following statements?
（A） Postal workers are representative of service workers in general.
（B） The delivery of letters is the primary activity of the postal service.
（C） Productivity should be ascribed to categories of workers, not to individuals.
（D） The quality of services rendered can appropriately be ignored in computing productivity.
（E） The number of letters delivered is relevant to measuring the productivity of postal workers.
不是很明白问题的意思，好绕啊。结合OG后面的解释更是糊涂了，哪位NN帮忙解释下这道题啦？
希望以后把正确答案写上
是D吧？postal worker说只看数量，只要送的多，就是productive,但是文中反驳了，理由是，不能只看数量，还要看质量（是否有信丢失或者延迟送达）。这正好是D要说明的
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