A nurse is in a provider's office is collecting data from an older adult client who has type 2 diabetes mellitus. Which of the following findings is a manifestation of poorly managed hyperglycemia?

A. Decreased urinary output is more often associated with dehydration or kidney disease, not a direct early manifestation of hyperglycemia. B. Cracked, dry, and flaky skin may occur with aging or other conditions, but it is not a specific indicator of poorly managed hyperglycemia. C. Poor wound healing is a common manifestation of chronic hyperglycemia due to impaired circulation and decreased immune response in clients with diabetes. D. A random blood glucose of 126 mg/dL is slightly elevated but does not alone indicate poorly managed hyperglycemia; fasting glucose and trends are more informative.