Suppose Tom, a 20-Year-Old Black Student, Is Participating in a Social

Suppose Tom, a 20-year-old black student, is participating in a social psychology experiment. The experimenter hands Tom six pictures, three of young black males and three of elderly black males, and asks him to rate these pictures on a number of dimensions. What feature has diagnostic value in this study?

A) age
B) race
C) gender
D) b and c
E) all of the above