Biometric access-control systems—those using fingerprints, voiceprints, and so forth, to regulate admittance to restricted areas—work by degrees of similarity, not by identity. After all, even the same finger will rarely leave exactly identical prints. Such systems can be adjusted to minimize refusals of access to legitimate access seekers. Such adjustments, however, increase the likelihood of admitting impostors.
Which of the following conclusions is most strongly supported by the information above?
Biometric access-control systems—those using fingerprints, voiceprints, etc., to regulate admittance to restricted areas—work by degrees of similarity, not by identity. After all, even the same finger will rarely leave exactly identical prints. Such systems can be adjusted to minimize refusals of access to legitimate access-seekers. Such adjustments, however, increase the likelihood of admitting impostors.
Which of the following conclusions is most strongly supported by the information above?
(A) If a biometric access-control system were made to work by identity, it would not produce any correct admittance decisions.
(B) If a biometric access-control system reliably prevents impostors from being admitted, it will sometimes turn away legitimate access-seekers.
(C) Biometric access-control systems are appropriate only in situations in which admittance of impostors is less of a problem than is mistaken refusal of access.
(D) Nonbiometric access-control systems—based, for example, on numerical codes—are less likely than biometric ones to admit impostors.(B)
(E) Anyone choosing an access-control system should base the choice solely on the ratio of false refusals to false admittances.
而其他所有Nonbiometric access-control systems的, work by identity的,如何选择access-control system 的,都比较无关了。
只有C选项,其实有点道理,就是既然Biometric access-control systems可以更好解决mistaken refusal of access,而自己又可能会带来admittance of impostors ,那么它就比较适合用于mistaken refusal of access问题比admittance of impostors问题更重要的情况下。但这个逻辑就没有B选项直接与原文逻辑相关,况且are appropriate “only” in situations也过于绝对。 所以要说most strongly supported ,还是B比较好