Which of the Following Correctly Applies the Principle of Impartiality

Which of the following correctly applies the principle of impartiality?

A) A mass murderer deserves the same treatment as a heart surgeon.
B) You cannot fairly punish one member of a group unless you punish all of them.
C) All moral judgments must be made on a case-by-case basis, setting aside all personal biases.
D) Everyone deserves the same treatment, unless there is a morally relevant reason to
Favor someone.