请问新东方逻辑section15-13题

13. 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 legiti-

  mate 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 reliable

       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.

   (E) Anyone choosing an access-control system

       should base the choice solely on the ratio of

       false refusals to false admittances.

为什么选B?我觉得应该选C啊

文章没有对其功用做任何的价值判断，也就不可能对价值的判断提供任何的支持。

嗯，有道理。要从argument中conlude C这个结论好像也不太好。谢谢cranberry兄。您还可以帮我看看