Indeterminate sentencing promotes which of the following?

Indeterminate sentencing is designed to promote rehabilitation by allowing for flexible sentencing based on individual circumstances. Imposing a minimum and maximum term provides the court flexibility to tailor the sentence to the offender's needs and potential for rehabilitation. For example, if an offender shows improvement in behavior or rehabilitative progress, they may be released earlier than the maximum term. This system acknowledges that not all offenders respond to punishment in the same way and allows for treatment and rehabilitation options to be incorporated into their sentences.

The other options do not align with the principles of indeterminate sentencing. Fixed sentences are characteristic of determinate sentencing, which provides no room for adjustments based on individual circumstances. Immediate release for good behavior, while beneficial in some contexts, is not the basis for indeterminate sentencing, which focuses on a broader rehabilitative approach rather than simply rewarding conduct. Lastly, mandatory sentences without the possibility of parole are a strict and inflexible framework that contradicts the rehabilitative focus of indeterminate sentencing.