(单选题)

One problem with the PreCheck program is .

A.a dramatic reduction of its scale

B.its wrongly-directed implementation

C.the governments reluctance to back it

D.an unreasonable price for enrollment

参考答案：D

参考解析：

细节理解题。倒数第二段第二句"this price tag has been the PreCheck's fatal flaw." , this 指代本段第一句话passengers必须每五年pay 85美元来做 background checks。 D 项中的 unreasonable price是原文的85美元，enrollment是原文的 process background checks 。A 项未提及，C 项错误，属于推理过度，政府不愿意支持是对原文的曲解。

知识点：阅读理解四选一英语专业基础知识阅读理解教师招聘-小学英语