In the United States,previous Findings on the Effects of Ethnic

In the United States,previous findings on the effects of ethnic minority status are being challenged because

A) numerous researchers have been identified as being racists.
B) past research often failed to consider the fact that ethnicity and SES are confounded.
C) new culture-free intelligence tests have been developed.
D) most previous research on ethnicity utilized Native Americans as subjects,and today this group is one of the smaller ethnic minority groups.