An Adolescent's Parent Comments,"My Son Seems So Preoccupied with His

An adolescent's parent comments,"My son seems so preoccupied with his appearance these days.Is this normal?" What is the nurse's best response?

A) "It is his attempt to express his individualism."
B) "His preoccupation with his looks is quite normal."
C) "He is probably troubled with his physical changes."
D) "This shows that he has a positive self-image."