ANS: D
A papule is something one can feel, is solid, elevated, circumscribed, less than 1 cm in diameter, and is caused by superficial thickening in the epidermis. A bulla is larger than 1 cm, superficial, and thin walled. A wheal is superficial, raised, transient, erythematous, and irregular in shape attributable to edema. A nodule is solid, elevated, hard or soft, and larger than 1 cm