单选题 12. In Stanton the average number of people injured per automobile accident is consistently higher for accidents involving a taxicab than for those not involving a taxicab. Although all Stanton taxicabs are equipped with passenger seat belts, taxicab drivers reporter that passengers tend not to use them. It is likely, therefore, that if taxicab passengers were required to use seat belts, the number of people injured per accident would soon be no higher for taxicabs than for other automobiles.
Which of the following, if true about Stanton, most seriously weakens the argument? ______

A、 The number of automobile accidents has been declining in recent years.
B、 Since taxicabs are driven more miles annually than most other vehicles, they are more likely to be in an accident during any given year than is the average vehicle.
C、 There are more taxicabs in operation, relative to the overall number of motor vehicles, than there are in most cities of Stanton's size.
D、 The number of people, including the driver, who occupy a vehicle is generally greater for taxicabs than for other vehicles.
E、 Not all passengers in automobiles other than taxicabs use seat belts.

【正确答案】 D

【答案解析】 D：因为车里人多，所以每次事故受伤的人会更多，而非因为没系安全带。属于“寻找他因”，正确。
A：文章讨论的是平均每次事故的受伤人数，和事故数量无关。
B：错误原因同选项A。
C：错误原因同选项A。
E：由该选项我们依然无法得知其他车和出租车乘客谁系安全带多，与原文无关，故不选。