Which of the Following Is Not a Principle of the Separate

Which of the following is not a principle of the separate confinement system?

A) Prisoners should not be treated vengefully but should be convinced that through hard and selective forms of suffering they can change their lives.
B) Solitary confinement prevents further corruption inside prison.
C) Solitary confinement is less effective due to the nature of humans.
D) In isolation,offenders reflect on their transgressions and repent.