How Is the County Jail the "Cell of Last Resort

Multiple Choice

How is the county jail the "cell of last resort?"

A) It exists as a holding cell for persons waiting to be executed after they are brought in from state/federal prisons.
B) It can act as a holding space for convicted offenders awaiting to serve out their sentence until space opens up in state/federal prisons.
C) It can serve as a place for convicted offenders to serve their sentence on weekends.
D) It allows for offenders to serve out work-release sentences so that they can keep their jobs.