Parole Is Based on Which of the Following Principles

Parole is based on which of the following principles?

A) The state extends a privilege by releasing offenders from prison before their full sentence is served.
B) It is a contract with offenders in exchange for their promise to abide by certain conditions where they return to prison to complete their sentences if they violate the contract.
C) The state controls parolees until they are dismissed from parole.
D) All of these choices.