Answer:
A). The parents are using punishment to suppress the screaming; their use of punishment is negatively reinforced by the cessation of screaming.
Step-by-step explanation:
B.F. Skinner's psychological concept of "Operant conditioning" implies a learning process through rewards and punishments as a consequence of particular behavior. Skinner demonstrated that it helps an individual to associate an action to a consequence that inculcates learning in them. In this situation(as per the question), Mary and Kathy employ punishment to suppress their kid's screaming as they refuse to give in to his demands. However, their use of punishment has negatively reinforced the cessation of screaming in the child as it may mar him demanding even the essential things in the future.