What Was the Finding of Lieberman Et Al

What was the finding of Lieberman et al. (2005) concerning the perception of Black and White faces by Black and White participants?

A) The amygdala showed a greater response to Black faces only in the White participants.
B) The amygdala showed a greater response to Black faces in the White participants and a greater response to White faces in the Black participants (an out-group effect)
C) The amygdala showed a greater response to White faces in the White participants and a greater response to Black faces in the Black participants (an in-group effect)
D) The amygdala showed a greater response to Black faces in both groups of participants.