John Is the Head of the Insurance Claims Department

John is the head of the insurance claims department.John works for longer hours than his subordinates.However,John is not paid overtime for working more than 40 hours per week.Under the FLSA,which of the following will justify the organization's decision not to give John overtime pay?

A) John is not a U.S. citizen.
B) John comes from an economically strong background.
C) John is unmarried.
D) John is considered as an exempt employee.
E) John has lower educational qualifications than his subordinates.