Three Teenagers Are Talking About Euthanasia and Give the Following

Three teenagers are talking about euthanasia and give the following responses.Which one demonstrates preconventional moral reasoning?

A) Andrea says,"I think it's right,because nothing justifies making people suffer when there is no hope of recovery."
B) Christian says,"I'd never kill anyone,not even to end dreadful pain,because I would probably be caught and sentenced to death or life imprisonment."
C) Caroline says,"It's absolutely wrong,obviously,because it's against the law."
D) All of the above demonstrate preconventional morality.