A mother is on the phone while holding her son. Since she is talking on the phone, and the person on the other end cannot see her, she is not using a lot of facial expression in this conversation

However, her voice indicates that she is quite angry and heated at the person on the other end. What would her son's reaction be to this incongruence of face and voice?
a. He would probably not be phased by it.
b. He would probably be distressed because his mother does not look angry, but she sounds angry.
c. He probably would find this funny.
d. He would probably fall asleep.

B. This would probably distress him.