Which of the following statements is most consistent with a Kantian or duty-based system of ethics?

a. Like cases should not be treated alike because people are different.

b. “Do not do unto others as you would have them do unto you.”

c. One must abide by the same rules that one would apply to others.

d. One should strive to promote the greatest good for the greatest number.

e. One should imagine what rules people would agree to in the Original Position.