Under the Accusatorial System Rationale, Forced Confessions Violate Due Process

Under the accusatorial system rationale, forced confessions violate due process, even if they are true, because:

A) forced confessions should be conclusively assumed to be unreliable.
B) they violate the Eight Amendment prohibition against cruel and unusual punishment.
C) under our system the state has the burden of proving guilt.
D) all of the above.