In Contemporary American Society, the Vast Majority of Construction Jobs

In contemporary American society, the vast majority of construction jobs are occupied by men. This can be explained by any of the following EXCEPT

A) men and women tend to seek jobs considered appropriate for cultural conceptions of gender.
B) employers tend to hire for positions based on their own conceptions of gender-appropriate work.
C) people tend to stereotype each other according to gender constructions, regardless of their own identities.
D) biological differences make women unsuitable for outdoor work.