Inflammation is ultimately needed to:

A. Dehydration is a major risk factor for renal calculi (kidney stones). When there is insufficient fluid intake, urine becomes concentrated, allowing substances like calcium, oxalate, and uric acid to crystallize and form stones.

B. A sedentary lifestyle can contribute to weight gain and other health issues, but it is not directly linked to the formation of kidney stones.

C. Drinking 32 ounces of milk per day is not a significant risk factor for kidney stones. In fact, moderate calcium intake from food can help prevent certain types of stones. Excessive calcium intake from supplements, however, can increase the risk.

D. Running 5 miles does not directly increase the risk of kidney stones. Regular physical activity, in general, helps promote overall health and hydration, which can reduce the risk of stone formation.

A. Diabetic retinopathy, a common complication of diabetes, is caused by microvascular changes in the eye. Chronic high blood sugar can damage the small blood vessels in the retina, leading to visual impairment. This is the most common cause of visual impairment in people with long-standing diabetes.

B. Exophthalmos is typically associated with thyroid disorders, particularly Graves' disease, not diabetes.

C. Abnormal metabolism in the lens can lead to cataracts, but it is not the primary cause of visual impairment in diabetic patients.

D. Cataracts are more common in people with diabetes, but they are not the primary cause of visual impairment in diabetes. Diabetic retinopathy due to microvascular damage is the leading cause.