I answer that law is a rule and a measure of acts that induces persons to act or refrain from acting For law is derived from binding because law obliges persons to act. And the rule and measure of human acts is reason, which is the primary source of human acts, as is evident from what I have said before,,. For t belongs to reasons to order us to our end, which is the primary source regarding our prospective action, as the Philosopher says. And the source in any kind of thing is the measure and rule of that kind of thing. And so we conclude that law belongs to reason.

According to the text, when is it justifiable to proceed against the cruelty of tyrants?
a) Through private presumption of a few
b) By public authority
c) When rulers have usurped power
d) When rulers command unjust actions