A nurse working on a psychiatric unit receives a telephone call from a client's employer. The employer asks for a copy of the client's latest laboratory work and psychological testing results so that the client's medical records in employee health can be updated. Based on the nurse's knowledge of breach of confidentiality, which response would be appropriate?

The correct answer is D: "I am unable to acknowledge whether or not your employee is a client on this unit." This response is appropriate because it maintains the client's confidentiality by neither confirming nor denying their presence on the unit. By not disclosing this information, the nurse upholds the client's right to privacy and prevents any potential breach of confidentiality.

Choice A is incorrect because it involves sharing confidential information without the client's consent. Choice B is incorrect because it implies that the employer can receive the information once the client gives consent, which may not be appropriate in this case. Choice C is incorrect because it flatly refuses to share any information, which could be seen as obstructive.

Overall, choice D is the most appropriate response as it prioritizes the client's confidentiality while still providing a professional and non-disclosing answer to the employer.