A nurse is performing an admission skin assessment on a client and notes that the client has a stage 3 pressure injury to the coccyx. How should the nurse document the appearance of this pressure injury?

a) Full-thickness skin loss with visible subcutaneous fat
b) Superficial skin loss involving the epidermis and dermis
c) Skin intact with non-blanchable redness
d) Full-thickness skin loss with exposed bone or muscle