Which of These Statements Reflects the Classical Liberal Ideal of Personal

Which of these statements reflects the classical liberal ideal of personal liberty?

A) We are morally permitted to do what we want with fellow human beings as long as it maximizes overall happiness.
B) We are morally permitted to do what we want with fellow human beings as long as they are adults.
C) We are morally permitted to do what we want with fellow human beings as long as they would consent to it if they were fully informed.
D) We are morally permitted to do what we want with fellow human beings as long as they provide informed consent to our treatment.