A nurse is assessing a client who has a blood glucose level of 265 mg/dL (74 to 106 mg/dL). Which of the following clinical manifestations is associated with this finding?

A. Shakiness: Shakiness is typically a manifestation of hypoglycemia, resulting from activation of the sympathetic nervous system. It occurs when blood glucose drops below normal levels, not with hyperglycemia, so it is not associated with a glucose level of 265 mg/dL. B. Confusion: Confusion can occur with both severe hyperglycemia and hypoglycemia, but it is more pronounced in extreme elevations of blood glucose or in hyperosmolar hyperglycemic states. A level of 265 mg/dL may not yet cause marked cognitive changes in all clients. C. Thirst: Hyperglycemia causes osmotic diuresis, leading to fluid loss and dehydration, which triggers excessive thirst (polydipsia). This is a common and early clinical manifestation associated with elevated blood glucose levels such as 265 mg/dL. D. Diaphoresis: Diaphoresis, or excessive sweating, is primarily a symptom of hypoglycemia caused by adrenergic stimulation. It is not a typical manifestation of hyperglycemia and is unlikely to occur with a blood glucose of 265 mg/dL.