Final answer:
The best nursing response is to help the client by saying, "I'll be happy to help you with measuring intake and output." It is the nurse's responsibility to assist the patient with healthcare needs such as measuring intake and output after surgery.
Step-by-step explanation:
The best nursing response to a client who asks for help with measuring intake and output following surgery is: D) "I'll be happy to help you with measuring intake and output." This response is professional and ensures that the nurse provides the necessary care and assistance to the patient. It is important for patients, especially postoperative patients, to have accurate measurements of their intake and output to assess their recovery and health status. A nurse is expected to support patients in their healthcare needs, and if they're unable to measure their intake and output themselves, it's the nurse's responsibility to assist or ensure that a member of the healthcare team helps the patient with this task.