In which of the following instances is disparate treatment considered legal?

A. In a particular retail outlet, male workers are employed to handle the sales.
B. In an electrical company, male workers are exclusively employed to work as electricians.
C. In a vehicle manufacturing company, male workers are exclusively employed in all departments.
D. In a certain shopping mall, female workers are exclusively employed to clean the ladies restroom.
E. In a particular hospital, only female nurses are appointed.

Answer: D. In a certain shopping mall, female workers are exclusively employed to clean the ladies restroom.