Answer: c. moral skepticism
Explanation: Moral skepticism stems from the view that no one can be an absolute judge of what is moral, the reason to be moral or what attributes makes a behavior/action moral.
A type of moral skepticism believes that the argument that an action is wrong because we label it as such is misguided. This is Dunia's reasoning. Although she labels certain ways of dressing as being wrong, she does not believe that this label would apply to everybody.