Women Tend to Pay More for Haircuts Than Men

Women tend to pay more for haircuts than men. One possible explanation is price discrimination. Another possible explanation is that:

A) women, on average, make less money than men.
B) women are more likely to be more demanding about their hair than men.
C) women are less likely to be bald, which pushes up demand.
D) women tend to take better care of their hair than men.