Condider the following statements in the light of Kant's maxims of morality and mark the correct answer.
1. Act only on that maxim which will to be a universal law.
2. So act as to treat humanity whether in thine own person or that of any other, always as an end and never as a means only.
3. Act as to be members of a kingdom of Ends.
Which of the above statements are correct?
Choose the correct answer:

A. Only 1 is true

B. Only 2 is true

C. Only 1 and 2 are true

D. 1, 2 and 3 are true

Answer: Option D