The Registered Nurse Is Teaching a Group of Student Nurses

The registered nurse is teaching a group of student nurses about the terminologies used to describe skin lesions. Which statement made by the student nurse needs correction?

A) "The dried yellowish and yellow-brown exudate on the skin is called crust."
B) "The hardening or thickening of the skin is referred to as erythema."
C) "Bulla is a blister with a diameter greater than 0.5 cm."
D) "Atrophy is thinning and loss of skin layers."