*criminology*
a mandatory minimum is
a.the mandatory minimum number of jurors that serve on a federal jury
b.a minimum sentence that must be imposed by a judge if an individual is found guilty of the crime
c.the minimum number of individuals in a prison cell block
d.the number of guards required per 10 inmates

A mandatory minimum is "a minimum sentence that must be imposed by a judge if an individual is found guilty of the crime".

Option B

Explanation:

Necessary minimum penalties are criminal sentences that involve minimum punishments determined by law. they'll apply to specific offences, specific offenders, or to explicit mixtures of offence and bad person characteristics.

The goal of those laws after they were developed was to push uniformity; it does not matter however strict or lenient your decide is, because the law and therefore the law alone determines the sentence you receive.