How does the author distinguish reconstructive and cosmetic surgery in paragraph 3?

Responses
A by comparing aesthetic needs of reconstructive surgery and cosmetic surgery by comparing aesthetic needs of reconstructive surgery and cosmetic surgery
B by showing how reconstructive surgery is more important than cosmetic surgery by showing how reconstructive surgery is more important than cosmetic surgery
C by explaining the purposes of the two types of plastic surgery by explaining the purposes of the two types of plastic surgery
D by explaining the problem of deformation and the solution of reconstructive surgery

C by explaining the purposes of the two types of plastic surgery