Which of the Following Statements Is True

Which of the following statements is true?

A) Discrimination in access to housing or medical care can affect the productivity of human capital investments.
B) Discrimination can be based on any categorical distinction between workers, such as age, race, gender, or religious preference.
C) Discrimination occurs in a labor market when workers are treated unequally because they are judged on the basis of an employer's perception of a group into which they are placed rather than on their skill or merit.
D) All of the above.