The Proper Economic Method of Selecting a Sentence Length Would

The proper economic method of selecting a sentence length would be to

A) compare the reduction in the total cost of (marginal cost) crime being perpetrated by the offender if released a year earlier with the reduction in incarceration costs (marginal benefit) for that shorter sentence.
B) compare the total cost of crime being perpetrated by the offender if released a year earlier with the incarceration costs for that shorter sentence.
C) compare the average cost of crime being perpetrated by the average offender if released a year earlier with the average incarceration costs for that shorter sentence.
D) poll pro bono defense attorneys and follow their recommendation.