Will Thorne Staff WriterWhen Audra McDonald was nine, she was offered to play “the little Black servant girl” in a production of William Gibson’s “The Miracle Worker.”McDonald desperately wanted the part, but her parents stepped in and refused.“The said no, it’s a demeaning role, you don’t have to do that, there are other roles you can do. You may not be happy with this now, but one day you’ll understand that you don’t have to perpetuate that stereotype.