求助大全A－3,以前没有讨论过的！

As part of our program to halt the influx of illegal immigrants, the administration is proposing the creation of a national identity card. The card would be available only to U.S. citizens and to registered aliens, and all persons would be required to produce the card before they could be given a job. Of course, such a system holds the potential, however slight, for the abuse of civil liberties. Therefore, all personal information gathered through this system would be held strictly confidential, to be released only by authorized personnel under appropriate circumstances. Those who are in compliance with U.S. laws would have nothing to fear from the identity card system.

In evaluating the above proposal, a person concerned about the misuse of confidential information would be most interested in having the author clarify the meaning of which of the following phrases?

(A) “all persons” (line 5)

(B) “however slight” (line 7)

(C) “civil liberties” (line 8)

(D) “appropriate circumstances” (line 11)（D）

(E) “U.S. laws” (line 2)

why is D?

这道题我是通过常识来理解的哈：就拿自己做个类比——我们对私人信息比较敏感之处就在于它在什么时候、什么地点、什么样的形式被什么样的人或组织了解到，并产生怎样的潜在影响——综上，即D所说的“appropriate circumstances”...

不知这样的解释对理解有没有帮助。。。

a person concerned about the misuse of confidential information would be most interested in having the author clarify the meaning of which of the following phrases?

不好意思，这句话是想问什么？楼上的解释还是不太明白？