What Is the Current Formulation of the Exclusionary Rule

What is the current formulation of the exclusionary rule?

A) Any information derived from illegally obtained evidence is inadmissible.
B) Illegally derived evidence is admissible as long as excluding the evidence would not deter unlawful police conduct.
C) In order to deter unlawful police conduct,the courts should not participate in the officer's illegality by allowing the fruits of the illegal conduct into court.
D) The exception to the exclusionary rule is that the illegally obtained evidence may be used if the accused would be set free without the evidence.