The correct option is
C This is a typical posture of women in advertising
From the line "she may sit astride the mudguard" to "whatever she does, she sells" , the writer gives examples of what advertisements look like, hence Option C is correct as the writer tries to tell that, that is one among the "typical posture of women in advertising."
Option A is incorrect because it is not true that women like to be subservient which means to be less important, and to obey what others say unquestioningly. In fact, nobody likes to be subservient, unless they are forced to.
Option B is incorrect because women might be obsessed with clothes, but that isn't a reason why the are seen doing that in an advertisement, hence it is incorrect as the writer talks about the advertising pose alone.
Option D is incorrect because the point made by the author is not related to intimacy at all, it is only about a specific pose in an advertisement that sells successfully, that doesn't imply what a woman likes or dislikes.