Answer:
D. Disparate treatment
Explanation:
Disparate treatment is a form of unlawful discrimination in the labour force. It's when a manager or leader gives unequal treatments to workers because of a certain characteristics. It is an intentional employment discrimination.
In this situation, the men suffers the evening shift just because they are men (certain characteristics).
Apart from gender another characteristics that is subjected to unequal treatments is race, where one race suffer more treatment than the other race.