Participants in a Study by J

Participants in a study by J.S.Morris et al.were presented with subliminal pictures of faces,some of which had been previously paired with electric shock.Results from the study revealed that:

A) participants showed an emotional response only when they could overtly see the faces.
B) participants showed an emotional response to all faces,regardless of whether they had been previously paired with shock.
C) the prefrontal cortex responded to the aversively conditioned stimuli,even though participants had no conscious awareness of having seen a conditioned face.
D) the amygdala responded to the aversively conditioned stimuli,even though participants had no conscious awareness of having seen a conditioned face.