Letter B is the correct answer.
Sylvia Ann Hewlett is an economist, lecturer, and expert on gender ad workplace issues who talks about successful executive women the myth of having it all. According to her, about 40% of high-achieving women are unmarried and childless, not because they made this choice but because for most of them the need for having ambitious careers, difficulty of bearing kids late in life and the male-female relationship asymmetries have led them to it.