A psychologist who has studied emotions with Paul Ekman for decades is going to present a summary of the research. Which title might this psychologist consider?

A) "Emotion as a Deviation"
B) "Emotion: Evolution's Big Mistake"
C) "Why Emotions Are Not Fully Developed in Humans"
D) "How Facial Expressions Communicate Emotions"

The psychologist's decades of research with Paul Ekman specifically on emotions suggests that the most appropriate title would focus on their work on nonverbal communication and the ways in which facial expressions communicate emotions. Therefore, "How Facial Expressions Communicate Emotions" is the best choice. The other three options suggest a negative or limited view of emotions, which is not consistent with Ekman's research on emotions as universal and adaptive phenomena.