Which of the Following Is an Example of Indeterminate Sentencing

Which of the following is an example of indeterminate sentencing?

A) offenders know how much time they will serve behind bars at the time of sentencing
B) offenders are given a range of sentencing possibilities and serve their time in prison within that timeframe
C) offenders are retained in prison until they are reformed
D) offenders are not initially sent to prison but will be if they commit another offense