Which Statement Illustrates the Concept of a Double Standard

Which statement illustrates the concept of a double standard?

A) A woman with many partners is considered a slut; a man with many partners is considered a stud.
B) Once considered shameful, cohabitation is generally accepted in the United States today.
C) Interracial marriage was once illegal.
D) Sex before marriage is now commonly accepted, despite religious prohibitions.
E) Childbirth outside of marriage is no longer considered sinful.