The Supreme Court's 1991 Ruling That a Coerced Confession Introduced

The Supreme Court's 1991 ruling that a coerced confession introduced during a trial does not automatically taint a conviction if it is a "harmless error" is an example of the Court's recent willingness to make exceptions to the requirements of

A) Miranda rights.
B) cruel and unusual punishment.
C) habeas corpus.
D) the exclusionary rule.
E) the right to privacy.