During the First Family Therapy Session,the Mother of a Child

During the first family therapy session,the mother of a child being treated for truancy and emotional outbursts asks the nurse,"Why are you bothering to ask the rest of us questions? My son is the one with the problems." The best response for the nurse would be:

A) "We'll get more accurate information if the entire family is involved."
B) "It may seem strange to you, but we'll get better results doing it this way."
C) "When one family member is sick, the whole family system is sick as well."
D) "Every family member's perceptions are very important to the total picture."