Although its purpose is laudable, the exclusionary rule, which forbids a court to consider evidence seized in violation of the defendant’s constitutional rights, has unduly hampered law-enforcement efforts. Even when the rights violation was a minor or purely technical one, turning on a detail of procedure rather than on the abrogation of some fundamental liberty, and even when it has been clear that the police officers were acting in good faith, the evidence obtained has been considered tainted under this rule and may not even by introduced. In consequence, defendants who were undoubtedly guilty have been set free, perhaps to steal, rape, or murder again.
5. The author of the passage above assumes all of the following EXCEPT:
(A) The constitutional rights of criminal defendants should be protected.
(B) Most cases in which the exclusionary rule has been invoked have involved purely technical violations of constitutional principles.
(C) The number of cases whose outcome has been affected by the exclusionary rule is significant.
(D) Some of the defendants set free under the exclusionary rule have been guilty of serious criminal offenses.
(E) Merely technical violations of the rules concerning evidence should be treated differently from deliberate assaults upon human rights.

oa b

B, beacuse the author talks about the situation when 'the rights violation was a minor or purely technical one' to illustrate or support his argument. However, nowhere in the passage does he mention the frequency of such cases. Therefore, there is no information to say that he assumed most cases were purely technical.