Final answer:
The OT should respond to the client with empathy and reassurance, addressing their concerns and offering support.
Step-by-step explanation:
In this situation, the OT should respond to the client with empathy and reassurance. The sudden change in behavior may indicate that the client is feeling anxious or insecure about their performance. The OT can validate the client's concerns and provide feedback to alleviate their worries. For example, the OT can say, "I understand that having a new member join the work line can be unsettling, but I want you to know that you are doing a great job. Is there anything specific that is making you feel unsure about your performance?" By addressing the client's concerns and offering support, the OT can help the client feel more confident and comfortable in the new work environment.