Which of the Following Functions Performed by the Skin Would

Which of the following functions performed by the skin would be lost or seriously compromised if someone suffered a severe burn over most of the body?

A) prevention of heat and water loss
B) prevention of massive and continuous infection from invasion by external bacteria,viruses,and parasites
C) production of sweat that evaporates and cools the body when it is overheating
D) conversion,in the presence of ultraviolet light,of precursor molecules to vitamin D
E) All of these are vital functions of the skin and would be compromised.