Joan Is a White 23-Year-Old Female,and Marcia Is a Black

Joan is a white 23-year-old female,and Marcia is a black 23-year-old female.Both Joan and Marica are economics majors,and they graduated from the same college in the same year with the same GPA.Joan and Marcia both got jobs at a brokerage firm after graduating from college.They both work equally hard.Joan earns $38,000 a year,and Marcia earns $30,000 a year.Select the best explanation for this wage difference.

A) Joan has less human capital than Marcia.
B) Joan receives a compensating wage differential that Marcia does not.
C) Joan has been discriminated against because she is white.
D) Marcia has been discriminated against because she is black.