Which of the Following Is NOT One of the Ways

Which of the following is NOT one of the ways in which Kant expresses the categorical imperative in the Grounding for the Metaphysics of Morals?

A) Act only according to that maxim whereby you can at the same time will that it should become a universal law.
B) Act in such a way that you treat humanity, whether in your own person or in the person of another, always at the same time as an end and never simply as a means.
C) Act only according to subjective principles whose universalized consequences are compatible with your ends themselves.
D) All maxims proceeding from a person's own legislation ought to harmonize with a possible kingdom of ends.