In the Promoting Emotion Knowledge Intervention, Researchers Developed a Program

In the Promoting Emotion Knowledge intervention, researchers developed a program within the context of Head Start to deliver an "Emotions Course" and an "Emotion-Based
Prevention Program" to promote children's emotion knowledge.
The intervention results showed that:

A) emotion knowledge increased for both control and experimental participants.
B) emotion knowledge was greater for experimental participants than it was for control participants.
C) there were no significant differences between control and experimental groups on emotion knowledge.
D) both control and experimental groups evidenced lower levels of emotion knowledge.