The most logical next step after the release from rehab is that he will participate in aftercare. Thus, the correct option is B.
Rehab may be defined as a process in which individuals are helped to live an ordinary life furthermore after they have been unhealthy, or when they have harbored a medication or alcohol nuisance.
Greg's dad is in the process of intervention when he is admitted for 60 days of rehab. But after the release from rehab, the process of intervention gets over, and now he will participate in the process of aftercare.
Therefore, it is well described above.
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