Final answer:
The most important question for the nurse to ask the patient with diabetes is about changes in the way sores or wounds heal.
Step-by-step explanation:
The most important question related to the skin that the nurse should ask the patient with a new diagnosis of type 2 diabetes mellitus is b. Have you noticed any changes in the way sores or wounds heal?
In patients with diabetes, slow or poor wound healing is a common problem. Elevated blood glucose levels can impair the body's ability to heal wounds and increase the risk of infection. Asking about changes in the healing of wounds can help the nurse assess the patient's diabetes management and identify any complications.