At Preschool, Jace Frequently Watches Keagan Hit Other Children and Take

At preschool, Jace frequently watches Keagan hit other children and take their toys. Jace notices that each time Keagan engages in this behavior, the teacher makes him give the toy back and sit in a time out. Because Jace does not want to get in trouble with his teacher, he patiently waits his turn for toys. Jace is demonstrating the concept of:

A) observational learning.
B) operant conditioning.
C) negative reinforcement.
D) reciprocal determinism.