Dr. Rhea Paul showed a video clip as an example to illustrate perlocutionary communication at 3 months. The example displayed a baby making eye contact, vocalizing, and smiling in response to their parent's speech. This behavior demonstrated the infant's ability to engage in pre-intentional communication.
a. Dr. Rhea Paul used a video clip to show perlocutionary communication
b. The example displayed a 3-month-old baby making eye contact and vocalizing
c. The baby's behavior demonstrated pre-intentional communication
d. The video illustrated the infant's ability to engage in nonverbal communication at 3 months