Answer:
C). Give the requested item or activity immediately every time the client requests it, even after the client has learned to mand consistently.
Step-by-step explanation:
RBT therapy is primarily designed as the therapy that intends to look for the ingenuous problem that has led to undesirable mental or emotional condition and behavior and proposes guidance to overcome it effectively.
As per the question, to encourage generalization and maintenance of critical behavior the RBT therapist would do all the given steps except for 'giving requested item or activity every time when the client demands it' as it would lessen the impact of their therapy and lead to re-occurrence of the problem in the patient. Thus, option C is the correct answer.