Which of the Following Examples Would Be Evidence That So-Called

Which of the following examples would be evidence that so-called 'women's work' and 'men's work' are not natural categories, but instead are socially constructed?

A) In the United States, the majority of physicians are men. In Russia, the majority of physicians are women.
B) Women are 5 times more likely than men to be nurses.
C) Gradually, more women are becoming chief executive officers (CEOs) in major corporations.
D) Both a and c, but not b
E) None of the above