The text strongly emphasizes two crucial reasons for the systematic fading of prompts explicitly stating Our answer is going to be D both A and C Firstly Option A is supported by the statement The worst thing that can happen is we get a young client we use prompts and we forget to fade them As they get older they become more and more what More and more reliant on those prompts This highlights the risk of prompt dependence where a learner becomes reliant on the prompt to perform the skill hindering their ability to generalize the skill or perform it independently in the absence of assistance Secondly Option C is supported by the explanation The prompt becomes the temporary SD in your contingencies We want that behavior to come under control of our SD not the prompt So we need to fade the temporary SD which in this case is the prompt This clarifies that a prompt when present often takes on the temporary role of a discriminative stimulus signaling the availability of reinforcement for a specific response For the behavior to be truly functional and maintained in the natural environment its occurrence must come under the control of the naturally occurring SDs not the artificial prompts Prompt fading systematically transfers stimulus control from the prompt to the natural SD Option B is incorrect because prompt fading is essential for all prompting procedures eg leasttomost graduated guidance time delay not just mosttoleast Any form of prompting introduces an artificial antecedent that must eventually be removed to promote true independence and ensure stimulus control by natural SDs