Exposure to certain chemicals commonly usedin elementary schools as cleaners or pesticides causes allergic reactions insome children. Elementary school nurses in Renston report that the proportionof schoolchildren sent to them for treatment of allergic reactions to thosechemicals has increased significantly over the past ten years. Therefore,either Renston’s schoolchildren have been exposed to greater quantities of thechemicals, or they are more sensitive to them than schoolchildren were tenyears ago.

　　暴露在某种化学物质，这种化学物质是通常被小学使用作为清洁剂或杀虫剂的，暴露在这种化学物质中会导致过敏反应在一些小孩子身上。Renston的小学护理员报道说：送到他们那里治疗这种化学物质过敏反应的学校孩子的比例已经增长得非常明显在过去的十年当中。因此，要么就是Renston的学校孩子已经比起十年前的学校孩子被暴露在了更大量的化学物质之中，要么就是他们这些孩子比起十年前的孩子更加对这种化学物质敏感。

　　Which of the following is an assumption onwhich the argument depends?

　　下列哪一个选项是文章论证所依赖的假设?

　　(A)Thenumber of school nurses employed by Renston’s elementary schools has notdecreased over the past ten years.

　　被Renston小学所雇佣的学校护理员的数量没有下降在过去的十年当中。

　　(B)Childrenwho are allergic to the chemicals are no more likely than other children tohave allergies to other substances.

　　对于这种化学物质过敏的孩子们没有更加可能，比起其他的孩子，没有更加可能对其他的物质过敏。

　　(C)Childrenwho have allergic reactions to the chemicals are not more likely to be sent toa school nurse now than they were ten years ago.

　　对于这种化学物质过敏的孩子们没有更加可能被送到学校护理员那里在现在比起十年以前。

　　(D)Thechemicals are not commonly used as cleaners or pesticides in houses andapartment buildings in Renston.

　　这种化学物质没有更加普遍地作为清洁剂或杀虫剂所使用在房子和公寓建筑当中在Renston地区。

　　(E)Childrenattending elementary school do not make up a larger proportion of Renston’spopulation now than they did ten years ago.

　　上小学的孩子们没有构成一个更大的比例在Renston人口当中，现在比起十年前。