A client visits the physician's office complaining of agitation, restlessness, and weight loss. The physical examination reveals exophthalmos, a classic sign of Graves' disease. Based on history and physical findings, the nurse suspects hyperthyroidism. Exophthalmos is characterized by:

1. dry, waxy swelling and abnormal mucin deposits in the skin.

2. protruding eyes and a fixed stare.

3. a wide, staggering gait.

4. more than 10 beats/minute difference between the apical and radial pulse rates.