Which of the following statements is true about diabetes mellitus?

Choice A reason: Sunken eyes are a sign of dehydration because the fluid loss causes the eyes to lose their shape and appear hollow. This is especially noticeable in older adults who have less fat and muscle around the eyes.

Choice B reason: Lower extremity weakness is a sign of dehydration because the fluid loss affects the blood volume and circulation, leading to reduced oxygen and nutrient delivery to the muscles. This can cause muscle fatigue, cramps, and weakness.

Choice C reason: High fever is not a sign of dehydration, but rather a possible cause of dehydration. Fever increases the body temperature and metabolic rate, which leads to increased sweating and fluid loss. However, fever itself does not indicate dehydration, unless it is accompanied by other signs and symptoms.

Choice D reason: Cough is not a sign of dehydration, but rather a possible cause of dehydration. Coughing can cause fluid loss through the respiratory tract, especially if it is productive or associated with vomiting. However, cough itself does not indicate dehydration, unless it is accompanied by other signs and symptoms.

Choice A reason: Measure the blood pressure in sitting and standing positions is not the next action by the nurse, as it is not relevant to the situation. The nurse should compare the blood pressure readings from both arms, not from different postures.

Choice B reason: Measure the blood pressure in the left arm is the next action by the nurse, as it can help determine if the high blood pressure is consistent or isolated to one arm. A difference of more than 10 mm Hg between the arms may indicate a vascular problem, such as atherosclerosis, aneurysm, or coarctation of the aorta.

Choice C reason: Document the findings in the medical record; elevated blood pressures are normal in older adults is not the next action by the nurse, as it is inaccurate and irresponsible. The nurse should not assume that elevated blood pressures are normal in older adults, as they may indicate hypertension, which is a risk factor for cardiovascular disease, stroke, and kidney damage. The nurse should also not document the findings without further assessment and intervention.

Choice D reason: Immediately contact the medical provider is not the next action by the nurse, as it may be premature and unnecessary. The nurse should first confirm the accuracy of the blood pressure readings by measuring the blood pressure in the left arm and checking the calibration of the device. The nurse should also consider other factors that may affect the blood pressure, such as pain, stress, caffeine, or medication.

Choice E reason: None of the above is not the correct answer, as there is one choice that is the next action by the nurse.