When evaluating the extent of an infant's dehydration, the nurse should recognize that the symptoms of severe dehydration (15%) include:
A. tachycardia, decreased tears, and 5% weight loss.
B. pulse and blood pressure, and intense thirst.
C. irritability, moderate thirst, and normal eyes and fontanel.
D. tachycardia, parched mucous membranes, and sunken eyes and fontanel.