On their first date, Brendan and Jonathan are sitting at a table getting to know each other. When Brendan leans in and rests his elbows on the table, Jonathan does the same thing without even realizing it. When Jonathan scratches his face, Brendan reaches up and adjusts his glasses without recognizing how he is copying the behaviors. These are examples of _________.
a. synchrony
b. impersonation
c. intentionality
d. altruism