The universal rules of Kantian ethics are based on two important principles: $1)$ consistency $-$ that is$,$ with no exceptions$-$and $2)$ reversibility $-$ that is$,$ the morality of someone else's conduct

A$.$ all cases are treated alike; the actor must reverse their opinion about

B$.$ all cases are treated alike; the actor must abide by the rule he or she uses to judge

C$.$ all people are treated differently; the actor must abide by the rule he or she uses to judge

D$.$ all cases are treated alike; the actor must be able to explain

E$.$ all people are treated alike; the actor must reverse their opinion about