Which of the Following Is a Valid Bona Fide Occupational

Which of the following is a valid bona fide occupational qualification exception?

A) Refusing to hire a woman because women are less capable of aggressive salesmanship.
B) Refusing to hire a woman as an airline pilot based on her age.
C) Refusing to hire a man because men are less capable of assembling intricate equipment.
D) Refusing to higher a woman based on the assumption that turnover rate among women is higher than among men.