The provided text explicitly states the client should be told about Extinction yes we want to tell the client that Extinction is occurring and emphasizes that if extinction is implemented in one setting eg the clinic it needs to happen everywhere eg school home through collaboration to ensure consistency and promote generalization Informing the client about the procedure when appropriate and at their level of understanding can increase cooperation and reduce potential side effects Implementing extinction across all relevant environments is crucial for preventing the behavior from continuing in unaddressed settings and improving the overall effectiveness and durability of the intervention Option B contradicts the guidance to inform the client Option C suggests limited scope and lack of client awareness which goes against the texts recommendations for generalization and transparency Option D is incorrect as withholding tangible items is a valid and common extinction procedure for behavior maintained by access to tangibles provided a proper functional assessment has been conducted