Comparing the Median Income of All White Males to the Median

Comparing the median income of all white males to the median income of all black males in order to determine the impact of job-market discrimination on earnings tends to

A) overestimate the impact because it does not account for differences in education and job experience
B) underestimate the impact because it does not account for differences in education and job experience
C) overestimate the impact because it accounts for differences in education and job experience
D) underestimate the impact because its accounts for differences in education and job experience
E) correctly estimate the impact