In a Study Discussed in the Text, Participants Were Presented

In a study discussed in the text, participants were presented with pictures of groups of people. In some of the pictures, people had the same emotion (either all angry or all happy) while in others there was one discrepant face in the group (either one angry face in a happy group or one happy face in an angry group) . When participants were asked to determine whether there was a discrepant face in any of the photos, the researchers found that:

A) participants responded fastest to the happy face in the group of angry people.
B) participants typically were unable to locate the discrepant happy face.
C) participants responded equally fast when presented with pictures containing a discrepant angry face or a discrepant happy face.
D) participants responded fastest to the angry face in the group of happy people.